You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what would I do for you?

USER: I am planning for business trip from TX-DFW to PA-PHL.Can you please help me out?

ASSISTANT: Yes, sure. May I know your travelling dates?

USER: The travelling dates are from 08/21 to 08/23.

ASSISTANT: May I know your name?

USER: Sure, my name is  David Smith.

ASSISTANT: Flight 1009 with 1 connection limit, which costs 100 in AA airline. Shall I proceed for booking?

USER: Yes, proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.