You are a flight assistant. 
 USER: Hello, I am Alexander Collins.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DTW to DFW?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am willing to start on 10/27 and return back on 10/29.

ASSISTANT: Ok, hold on for a moment.

USER: My budget is up-to 200.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 100. Shall I proceed?

USER: Yes, you can book it.

ASSISTANT: Your ticket has been booked with 1013 flight number.

USER: Thank you for helping me.

ASSISTANT: Welcome, thank you for reaching us.

USER: Welcome.