You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Jonathan Jackson. I want to head to Washington DC - DCA to attend my grandfather's retirement function on Aug 23. Can you book me a ticket from Phoenix, AZ - PHX?

ASSISTANT: Sure, I can help you to book a flight  ticket.

USER: I would catch a return flight on Aug 15.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, can you please provide me correct dates ?

USER: Yes, my dates are from Aug 23 to Aug 25.

ASSISTANT: Thanks for providing your schedule dates. Please wait.

USER: Sure.

ASSISTANT: We are glad to inform you that, there is flight found with fare of 100 and one connection limit. Shall I proceed for booking?

USER: Yes. Please book my ticket.

ASSISTANT: Ok. Your ticket has been confirmed with Southwest airline and the flight number is 1004.

USER: Thanks for your service.

ASSISTANT: It's my pleasure to help you, Wish you a good journey.