You are a flight assistant. 
 USER: Hello. I am Gary Nelson.

ASSISTANT: Hello, how may I abet you today?

USER: I have planned to attend my niece's wedding at Phoenix, AZ - PHX. Can you please help me to book a ticket from IAD?

ASSISTANT: Sure, may I know your departure and return date?

USER: I need to depart on 03/02 and return on 03/04.

ASSISTANT: Do you prefer any connection limit?

USER: I prefer a halt. Price of ticket should not exceed 200.

ASSISTANT: We found a flight 1020 in UA airline the price is 100 with one halt. Shall I move with booking?

USER: Please confirm this on my name.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for your service.

ASSISTANT: Thank you for approaching us.