You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am William Williams, I am looking for a flight ticket from HOU to DTW. Can you please search for that?

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

USER: I want to depart on 03/05 and return on 03/07. Ok, please make sure that the price should not exceed 200.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Spirit airlines is having a flight with travel charge of 100, shall I proceed for booking?

USER: proceed for booking.

ASSISTANT: Your ticket has been booked with flight-1029, have a safe journey.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.