Document:

Exhibit 10.15

CONFIDENTIAL TREATMENT REQUESTED BY 800 TRAVEL SYSTEMS, INC. FOR PORTIONS OF
THIS AGREEMENT INDICATED BY [**..**] AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                     AMENDMENT TO SABRE SUBSCRIBER AGREEMENT
                            (INTERNET/ON-LINE USAGE)

This Amendment to that certain SABRE Subscriber Agreement is made and entered
into this 5th day of November, 1999 between Sabre Inc., formerly known as The
SABRE Group, Inc., ("Sabre") and 800 Travel Systems, Inc. ("Customer").

                                    RECITALS

WHEREAS, Sabre and Customer have entered into that certain Sabre Subscriber
Agreement, dated as of May 21, 1999 (the "Agreement"); and

WHEREAS, it is in the best interest of the parties to modify certain provisions
of the Agreement.

NOW THEREFORE, in consideration of the mutual covenants contained herein, Sabre
and Customer hereby agree as follows:

         1. ARTICLE 16.1 OF THE AGREEMENT IS HEREBY MODIFIED BY THE ADDITION OF
THE FOLLOWING SENTENCE:

         Notwithstanding the previous provisions, Customer may create and
maintain an Internet Connection for third-parties with Sabre's prior permission
and as long as: (i) all travel related activity done through such websites is
done through the Sabre System, (ii) Customer is responsible for all Charges
related to such activity, (iii) such third parties can not have their principal
offices in Asia or the South Pacific, (iv) such websites can not target or be
marketed directly to consumers located in Asia or the South Pacific, and (v)
such sites must comply with all other terms and conditions of this Article 16.

         2. ARTICLE 16.2 OF THE AGREEMENT IS HEREBY REPLACED WITH THE FOLLOWING:

          The limited license granted in Article 16.1 may be terminated by Sabre
for Customer's misuse of the System or the Sabre System via the Internet
Connection upon fifteen (15) days written notice to Customer and Customer's
failure to remedy such misuse within the allotted fifteen days. Upon such
termination, Customer must immediately remove the Internet Connection and cease
utilizing data transmitted under the Agreement for purposes of developing,
operating or maintaining a reservation booking site.

         3. THE CHARGES APPLICABLE IN ARTICLE 16.4 OF THE AGREEMENT WILL BE
BASED ON THE FOLLOWING MONTHLY RATE SCHEDULE:

                  [**..**]

         This rate shall apply from the effective date of this Amendment until
         December 31, 2000 and will be subject to change thereafter upon thirty
         (30) days written notice to Customer.

         4. CONFIDENTIALITY. It is expressly understood and agreed that this
Amendment and the Agreement, and each and every provision hereof, shall be held
and treated as confidential and shall not be disclosed by either party to any
other person, firm, organization, association, or entity, of any and every kind,
whether public, private or governmental, for any reason, or at any time, without

<PAGE>

the prior written consent of the non-disclosing party, unless such disclosure is
requested by law or legal process relating to proceedings between a party hereto
and any third party. In the event of a disclosure inconsistent with the
foregoing, this Amendment and the Agreement may be terminated immediately by the
non-disclosing party, with notice to the disclosing party, and the
non-disclosing party shall have the right to pursue any remedies available to it
in law or in equity. Notwithstanding the foregoing, either party may disclose
Confidential Information as required by law or governmental authority, including
pursuant to a subpoena or court order, only if the receiving party: (i) promptly
notifies the disclosing party of the disclosure requirement; (ii) cooperates
with the disclosing party's reasonable efforts to resist or narrow the
disclosure and to obtain an order or other reliable assurance that confidential
treatment will be accorded the disclosing party's Confidential Information; and
(iii) furnishes only Confidential Information that the receiving party is
legally compelled to disclose according to advice of its legal counsel.
"Confidential Information" excludes information that: (i) was in the public
domain when communicated; (ii) enters the public domain through no fault of the
receiving party; (iii) was in the receiving party's possession free of any
obligation of confidence when communicated; (iv) is rightfully communicated to
the receiving party by a third party free of any obligation of confidence to the
disclosing party; or (v) is developed by or on behalf of the receiving party
independently of and without reference to any of the disclosing party's
Confidential Information.

         5. DEFINED TERMS. The defined terms not otherwise defined in this
Amendment shall have the meaning given to them in the Agreement.

         6. UNIQUE PSEUDO CITY CODE (IPCC) REQUIREMENT. All On-line/Internet
booking and shopping activity is required to be conducted through a unique IPCC.
Booking and shopping activity terminating in the Customer's chat-enabled site
will be booked through a Sabre agency PCC.

         7. AGREEMENT. Except as otherwise provided herein, all other terms of
the Agreement remain in full force and effect and are hereby reaffirmed. In the
event of any conflict between the terms of the Agreement and this Amendment, the
Amendment shall control.

IN WITNESS WHEREOF, the parties have executed this Amendment as of the day and
year written above.

             800 Travel Systems, Inc.                  SABRE INC.

By:                                       By:
---------------------------------------   --------------------------------------
(SIGNATURE)                               (SIGNATURE)

Name: Mark Mastrini                       Name: Michael Sites
---------------------------------------   --------------------------------------
(PRINT NAME)                              (PRINT NAME)

Title: Chief Executive Officer            Title: Vice President
---------------------------------------   --------------------------------------

PCC: B8T3Exhibit 10.16

CONFIDENTIAL TREATMENT REQUESTED BY 800 TRAVEL SYSTEMS, INC. FOR PORTIONS OF
THIS AGREEMENT INDICATED BY [**..**] AND FILED SEPARATELY WITH THE SECURITIES
AND EXCHANGE COMMISSION.

                       AGREEMENT FOR DEVELOPMENT SERVICES

         November 5, 1999 (the "Effective Date"), for and in consideration of
the mutual promises herein, 800 Travel Systems, Inc. located at 4802 Gunn
Highway, Ste. 140, Tampa, FL 33624 and incorporated in Delaware ("Customer") and
Sabre Inc., formerly known as The SABRE Group, Inc., located at 4255 Amon Carter
Blvd., Fort Worth, Texas 75261 and incorporated in Delaware ("Sabre")

         WHEREAS, Sabre provides computerized reservations services with related
data processing activities through its SABRE(R) computer reservation system
("Sabre System"); and

         WHEREAS, Customer and Sabre have entered into a Sabre Subscriber
Agreement dated May 21, 1999 ("Subscriber Agreement") for access to and use of
the Sabre System; and

         WHEREAS, Customer wishes to obtain and Sabre wishes to provide certain
software development and consulting services related to the creation of an
Internet travel reservation booking site, including its integration with
Customer's interactive chat site, for use in conjunction with the Sabre System
and subject to the provisions of the Subscriber Agreement.

NOW, THEREFORE, in consideration of the mutual covenants contained herein, the
parties hereto agree as follows:

1.       DESCRIPTION OF SERVICES. Sabre will perform certain consulting and
         software development services for Customer upon the terms and
         conditions herein, as such services are more particularly described in
         Exhibit A, which is attached hereto and incorporated by reference
         herein (the "Services"). Any software delivered under Exhibit A as part
         of the Services shall be referred to as "the Software." This Agreement
         relates only to the Services and does not relate to additional services
         as defined below that Sabre may be asked to perform on Customer's
         behalf.

2.       ACCEPTANCE TESTING. During the thirty (30) day period following
         delivery, Customer shall perform user acceptance testing of the
         Software deliverable, pursuant to mutually agreed upon
         Customer-provided test scripts, to confirm material conformity of the
         Software with the functional description identified in Exhibit A. Sabre
         shall provide assistance to Customer during such user acceptance
         testing at no additional charge. Customer shall notify Sabre
         immediately of any material non-conformities between the Software and
         the functionality described in Exhibit A. Sabre shall make corrections
         in any such material non-conformities of the Software to the
         functionality identified in Exhibit A and re-submit such previously
         non-conforming portion for re-testing. Acceptance shall take place when
         the Software conforms to the functionality identified in Exhibit A or
         when the Software is put in productive use by Customer, whichever is
         earlier ("Acceptance").

3.       PAYMENT. (a) Customer shall pay Sabre [**..**] for the Services due and
         payable as follows: [**..**] payable within [**..**] after Acceptance.

         (b) Additional services not described in this Agreement ("Additional
         Services") which are requested by Customer shall be provided at a rate
         of [**..**] per hour per Sabre representative. Such Additional Services
         may include, but are not limited to, software modifications that may

<PAGE>

         alter the function or look of the site (the "Programming Changes").
         Sabre shall make all Programming Changes requested by Customer, except
         where the Programming Changes would infringe upon Sabre's trademark
         rights, for a period of [**..**] days following Acceptance and up to a
         maximum of [**..**] of labor time or until a Maintenance Agreement or
         other Development Agreement has been signed.

         (c) In addition, food, lodging and related expenses incurred by a Sabre
         representative in connection with any travel requested by Customer in
         connection with the Services, will be reimbursed by Customer at the
         rate of [**..**] per person ("Per Diem"). The Per Diem is subject to
         adjustment from time to time in accordance with rates published by the
         U.S. government for the city where the Services are being performed
         ("CONUS"). Customer shall reimburse Sabre for actual air and local
         transportation expenses incurred in connection with the performance of
         the Services and approved in advance by Customer.

         (d) Customer shall reimburse Sabre as additional fees for (i) all
         taxes, excluding any interest or penalties, imposed on Sabre arising
         from this Agreement excluding U.S. income taxes, and (ii) any
         additional taxes, including U.S. income taxes, imposed on Sabre as a
         result of any reimbursements of taxes under clause (i) or (ii) of this
         paragraph 3(d).

         (e) Fees for additional Services in paragraph 3(b) and expenses in
         paragraph 3(c) shall be due thirty (30) days after receipt of invoice
         from Sabre. Any request by Customer for back-up documentation relating
         to a particular Sabre invoice must be received by Sabre within thirty
         (30) days of receipt of such invoice by Customer.

4.       OWNERSHIP. Sabre shall retain all right, title and interest in and to
         any deliverable provided to Customer hereunder. Sabre hereby grants to
         Customer, in consideration for the payment of all fees and charges
         identified in paragraph 3 above, a royalty-free, non-exclusive,
         non-transferable right and license to use, and copy any Sabre
         deliverable solely for the purpose of Customer, its employees and its
         customers accessing the Sabre System for travel-related information or
         to make travel reservations. Customer shall not market, sub-license or
         otherwise transfer any Sabre deliverable to any third party without the
         prior written consent of Sabre which consent will not be unreasonably
         withheld, unreasonably delayed or unreasonably conditioned. Any
         sub-license of the Software will be subject to an additional [**..**]
         per sub-licensed site and will require Customer to execute a separate
         Software Support and Maintenance Agreement with Sabre for each
         sub-licensed site. Any export of the Software or any intellectual
         property delivered hereunder shall be in accordance with the U.S.
         Department of Commerce regulations and all applicable laws or
         regulations.

5.       NON-DISCLOSURE. This Agreement and any information disclosed by either
         party to the other pursuant to this Agreement, will be governed by that
         certain Non-Disclosure Agreement and its Supplement entered into
         between the parties dated November 5, 1999.

6.       RELATIONSHIP. Sabre shall be and act as an independent contractor
         hereunder and no employee of Sabre shall be deemed to be an employee of
         the Customer for any purpose whatsoever.

7.       INDEMNIFICATION. (a) Sabre will defend, indemnify and hold harmless
         Customer, its affiliates, subsidiaries, successors and assigns and
         their officers, directors, agents and employees, jointly and severally,
         at Sabre's expense, from, against, and with respect to any claim,
         action, suit or other proceeding arising out of or in any manner,
         incident, relating, or attributable to third party claims of direct
         infringement of any duly issued United States patent, copyright,
         trademark, service mark, trade dress, trade secret, or other
         proprietary right resulting from the supply to Customer by Sabre, or
         the use by Customer or its approved sub-licensees, of the Software as
         delivered ("Infringement"). Sabre shall pay all damages and costs
         (including without limitation reasonable attorney's fees) finally
         awarded against Customer which are attributable to such Infringement.

<PAGE>

                  (b) Should the Software as delivered by Sabre hereunder
         become, or in Sabre's opinion be likely to become the subject of a
         claim of Infringement, then Sabre may, at its option and expense; (i)
         procure for Customer the right to use the Software free of any
         liability for Infringement; (ii) replace or modify the Software with a
         non-Infringing substitute otherwise complying with all the
         functionality identified in Exhibit A, or (iii) repurchase the Software
         for its depreciated value (based upon a three year straight line
         depreciation schedule), and thereby terminate this Agreement. Sabre
         shall not be obligated to defend, or be liable for costs and damages,
         if the Infringement arises out of (1) modification of the Software
         other than by Sabre or its agent, (2) the compliance with Customer's
         specifications in Exhibit A (to the extent the same go beyond
         specifications of Software previously developed by Sabre), (3) use of
         the Software in combination with or in addition to the equipment or
         computer programs not licensed or developed by Sabre, or (4) a breach
         of this Agreement by Customer.
                  (c) Each party agrees to indemnify and hold each other, their
         affiliates, subsidiaries, successors and assigns and their officers,
         directors, agents and employees, jointly and severally, harmless
         against any suit, claim, damages and expense (including reasonable
         attorneys' fees) by reason of (i) any personal injuries or tangible
         property damage which may occur as the result of its acts or omissions
         in the course of the performance of this Agreement, or (ii) breach of
         its obligations under this Agreement.
                  (d) Except as expressly provided for in this paragraph 7,
         Customer shall defend, indemnify and hold harmless Sabre from any and
         all claims or causes of action arising out of Customer's or any of its
         approved sub-licensee's use of the Software, and pay any and all
         damages and expenses (including reasonable attorneys fees incurred by
         Sabre) in connection therewith, regardless of the circumstances of the
         claim or damage.
                  (e) All indemnification obligations under this paragraph 7
         will be subject to the following requirements: (i) the indemnified
         party shall provide the indemnifying party with prompt written notice
         of any claim; (ii) the indemnified party shall permit the indemnifying
         party to assume and control the defense of any action upon the
         indemnifying party's written acknowledgment of the obligation to
         indemnify (unless, in the opinion of counsel of the indemnified party,
         such assumption would result in a material conflict of interest); and
         (iii) the indemnifying party shall not enter into any settlement or
         compromise of any claim without the indemnified party's prior written
         consent, which shall not be unreasonably withheld. In addition, the
         indemnified party may, at its own expense, participate in its defense
         of any claim.

8.       WARRANTY. SABRE DISCLAIMS, AND CUSTOMER HEREBY WAIVES ALL EXPRESS AND
         IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO ANY IMPLIED WARRANTY
         OF MERCHANTABILITY OR FITNESS FOR PURPOSE OF ANY PRODUCTS OR SERVICES
         FURNISHED HEREUNDER. CUSTOMER UNDERSTANDS THAT PRODUCTS AND SERVICES
         ARE PROVIDED "AS IS".

9.       LIMITATION OF LIABILITY. EXCEPT FOR SABRE'S INDEMNIFICATION OBLIGATIONS
         UNDER PARAGRAPHS 7(a) AND 7(c), CUSTOMER WAIVES ALL LIABILITY IN TORT
         OF SABRE, INCLUDING, WITHOUT LIMITATION, ANY LIABILITY ARISING FROM
         NEGLIGENCE. SABRE SHALL NOT BE LIABLE TO CUSTOMER FOR ANY INCIDENTAL OR
         CONSEQUENTIAL DAMAGES, UNDER ANY CIRCUMSTANCES, INCLUDING, BUT NOT
         LIMITED TO, LOST PROFITS, REVENUE OR SAVINGS, OR THE LOSS OF USE OF ANY
         DATA, EVEN IF SABRE HAD BEEN ADVISED OF, KNEW, OR SHOULD HAVE KNOWN, OF
         THE POSSIBILITY THEREOF. EXCEPT FOR SABRE'S INDEMNIFICATION OBLIGATIONS
         UNDER PARAGRAPH 7(a) AND, WITH REGARD TO CLAIMS ARISING FROM SABRE'S
         GROSS NEGLIGENCE OR WILLFUL MISCONDUCT, UNDER PARAGRAPH 7(c), UNDER NO
         CIRCUMSTANCES SHALL SABRE'S LIABILITY IN CONNECTION WITH THE SERVICES
         EXCEED IN THE AGGREGATE THE TOTAL AMOUNT OF CHARGES ACTUALLY PAID TO
         SABRE PURSUANT TO THIS AGREEMENT.

<PAGE>

10.      CHOICE OF LAW. THIS AGREEMENT AND ANY DISPUTE ARISING HEREUNDER SHALL
         BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF TEXAS WITHOUT REGARD TO
         PRINCIPLES OF CONFLICT OF LAWS.

11.      TERM. This Agreement shall be effective as of the Effective Date and
         shall continue in effect until termination or expiration of the
         Subscriber Agreement , or any renewal thereof.

12.      NOTICES. Any notice, demand or document which any party is required or
         desires to give or deliver to or make upon the other party shall be in
         writing and shall be (a) personally delivered or (b) delivered by
         depositing in the United States Mail, registered or certified, return
         receipt requested, with postage prepaid, addressed as follows:

         If to Sabre:
                                              4255 Amon Carter Boulevard
                                              MD4462
                                              Fort Worth, TX  76155
                                              ATTN:  President

         with cc to General Counsel:          4255 Amon Carter Boulevard
                                              MD4204
                                              Fort Worth, TX  76155
                                              ATTN: General Counsel

         If to Customer:                      4802 Gunn Highway, Ste. 140
                                              Tampa, FL 33624
                                              ATTN: Mark Mastrini

         or to such other address as the respective parties hereto shall
         designate by notice similarly given to the other party. Any such
         notice, demand or document shall be deemed to be effective upon receipt
         of the same by the party to whom said notice, demand or document is
         addressed.

13.      SAVINGS CLAUSE. If any provision of this Agreement is prohibited by law
         or held to be invalid, illegal or unenforceable, the remaining
         provisions hereof shall not be affected, and this Agreement shall
         continue in full force and effect as if such prohibited, illegal or
         invalid provision had never constituted a part hereof, with this
         Agreement being enforced to the fullest extent possible.

14.      ENTIRE AGREEMENT. This Agreement, together with Exhibit A, constitutes
         the entire agreement between the parties related to the subject matter
         hereof, supersedes any prior agreement between the parties relating to
         the subject matter hereof, and shall not be changed except by written
         agreement signed by a duly authorized representative of each party.

15.      PROMOTIONS. Notwithstanding anything herein to the contrary, Sabre or
         Customer may publicly disclose that Sabre and Customer have entered
         into this Agreement and that Sabre has agreed to provide the Services
         to Customer.

16.      OTHER PRODUCTS. Except for the parties' obligations under Paragraphs 4
         and 5, nothing herein shall prohibit, or in any way limit, the parties'
         rights to use, develop or market existing or subsequently developed or
         modified software, technology or concepts, or to use their expertise,
         skills or knowledge acquired during the performance of the Services
         rendered under this Agreement in any current or subsequent endeavors.

<PAGE>

17.      FORCE MAJEURE. Sabre shall be excused from performing hereunder to the
         extent that it is prevented from performing as a result of any act or
         event which occurs and is beyond the reasonable control of Sabre,
         including, without limitation, acts of God, war, or any action of a
         governmental entity; provided that Sabre provides Customer with prompt
         written notice thereof and uses all reasonable efforts to remove or
         avoid such causes.

19.      MISCELLANEOUS. Any rights and obligations which expressly or by their
         nature are intended to survive and continue after termination of this
         Agreement, including, without limitation, paragraphs 4, 5, 7, 8, 9 and
         16 shall so survive and bind the parties, their successors and assigns.
         The parties warrant and represent that they are authorized to enter
         into this Agreement and that this Agreement is binding and enforceable
         against them.

         IN WITNESS WHEREOF, the Customer and Sabre have executed this Agreement
on the date set out below.

          800 Travel Systems, Inc.                         Sabre Inc.

By:                                           By:
-----------------------------------------     ----------------------------------
(Signature)                                   (Signature)

Name:  Mark Mastrini                          Name:  Michael Sites
-----------------------------------------     ----------------------------------
(Print Name)                                  (Print Name)

Title: Chief Executive Officer                Title:  Vice President
-----------------------------------------     ----------------------------------

PCC: B8T3                                     Date:

<PAGE>

                                    EXHIBIT A
                     PHASE I/II CUSTOMER SYSTEM REQUIREMENTS

The following exhibit enumerates the specific functionality of the Software, to
be delivered and available for Customer's testing within [**..**] of the
execution of this Agreement by Sabre, provided however, delivery of the Services
may be extended by 12 weeks by Sabre as a result of Sabre's Year 2000
freeze-related delays upon prior written notice to Customer. Any functionality
not specifically delineated in this exhibit will not be provided, except as an
enhancement to be separately negotiated following completion of the Services.

[**..**]

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