You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I support you?

USER: I am Mary Young. I am planning to travel on 04/22 for shopping with my colleagues. Can you please assist me in booking a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are from Phoenix AZ-PHX to Washington DC-DCA.

ASSISTANT: When you want to return from Washington?

USER: I intend to return on 04/24.

ASSISTANT: Thanks for your details, there is a connecting flight with 1024 flight number of fare 100 from Frontier airline. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your flight ticket has been processed.

USER: Thank you.

ASSISTANT: Thanks for using our service.