You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Andrew Turner. I am planning to attend music concert at Houston, can you please help me with booking a flight ticket?

ASSISTANT: Turner, I am here to help you. Can you please provide us your origin and destination airport codes?

USER: My source airport code is DCA and the destination airport code is IAH.

ASSISTANT: Ok, can you please tell me your trip dates?

USER: Sure, I would like to take off on 06/20 and return back on 06/22.

ASSISTANT: Ok, please be online for a while.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: Sure, there is a flight available with 1 connection and the airlines is Frontier. Shall I book the ticket?

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket is confirmed with the flight-1006.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for choosing us.