You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid  you?

USER: Kevin Jackson here. Can you help me to book a flight with 500 price limit from PHX?

ASSISTANT: Sure, can you share your destination details please?

USER: My travelling destination airport code is IAD.

ASSISTANT: Your travel dates please?

USER: My trip starts from 08/15 to 08/17.

ASSISTANT: Thanks for waiting. I have found UA airlines which flies with one connection.

USER: Yes, proceed.

ASSISTANT: Sure, your flight ticket has been confirmed now.

USER: Thank you.

ASSISTANT: Thank you.