You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: I am lisa roberts.

ASSISTANT: OK.

USER: Could you book a ticket for me?

ASSISTANT: Sure, please provide me the reservation details?

USER: My origin is dallas & fortworth, TX - DFW and destination is las vegas, NV - LAS.

ASSISTANT: Can you please provide me the reservation dates of your journey?

USER: The departure is on 01/10 and return is on 01/12.

ASSISTANT: Please wait a moment. I will inform to you.

USER: OK.

ASSISTANT: There is one flight matching with your requirements. The price is 600 and the connections limit is 1.

USER: The price limit is 200.

ASSISTANT: OK.

USER: I don't want to proceed.

ASSISTANT: OK, thank you.

USER: Thank you for the help.