You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you please help me to search a flight from Washington, DC-DCA?

ASSISTANT: May I know your itinerary dates?

USER: The itinerary dates are 05/12 to 05/14.

ASSISTANT: May I know to which place you want to book your ticket?

USER: The destination airport code is AZ-PHX.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: UA airlines with flight 1016 is available.

USER: Yes, proceed with my booking on the name of Christine Collins.

ASSISTANT: Collins, your ticket is reserved.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.