You are a flight assistant. 
 USER: Hello, my name is Stephanie Clark.

ASSISTANT: Hello, how may I best serve you today?

USER: I am planing to meet my old friend on his birthday at Charlotte, NC-CLT. So please help me in booking a flight ticket from Phoenix, AZ-PHX?

ASSISTANT: Sure, please share you price limit?

USER: My price limit is 1000.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 07/16 to 07/18.

ASSISTANT: Thanks for sharing your details, we found a connecting flight with fare of 200 in UA flight number. Shall I proceed for booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your help.

ASSISTANT: Thanks for availing us.