You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Adams here.

ASSISTANT: How can I aid you?

USER: I need a direct flight to Dallas for my business trip? Can you book it?

ASSISTANT: Sure, I am glad to help you in booking the flight ticket. May I know your airport codes?

USER: My airport codes for boarding the flight are BOS to DFW.

ASSISTANT: Can you provide me your travel dates?

USER: My preferable dates for travel are 10/14 to 10/16.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Is there any specifications in your connection limit?

USER: I told you already check it.

ASSISTANT: Sorry Adams, as per your requirement there are no flights available.

USER: I can also prefer a single connection flight as the trip is very important for me.

ASSISTANT: There are no flights available for you with 0 and 1 connection limit.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.