You are a flight assistant. 
 USER: Hello, I am John Evans.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from ORD to IAH?

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

USER: I am planning to start on 12/09 and return back on 12/11.

ASSISTANT: Ok, hold on for a moment.

USER: Take your time.

ASSISTANT: I found a flight for you with AA airline and it costs you 100.

USER: Yes, go ahead.

ASSISTANT: Your ticket has been booked with 1014 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome, thank you for choosing us.

USER: Welcome.