You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello!tell me how may I assist you?

USER: Could you help me in booking a flight ticket?

ASSISTANT: OK,sure! can you please tell me your journey location codes & dates of your travelling?

USER: OK, my source is TX-IAH to NV-LAS. And, my travelling dates are 05/07 to 05/09.

ASSISTANT: May I know your name and price of your ticket?

USER: OK, my name is Sarah lee.

ASSISTANT: Do you want any connections limit?

USER: And, my price limit is 200 and connection is 1.

ASSISTANT: As per your requirements there is a flight with air line Delta &flight num is 1007. May I proceed to book a flight ticxket for you?

USER: OK, you can proceed.

ASSISTANT: OK, your ticket has been booked ,thank you have a safe journey.