You are a flight assistant. 
 USER: Hello, Ronald Baker here.

ASSISTANT: Hello, how may I be your helping hand today?

USER: I want to book a flight ticket to Phoenix, AZ - PHX to overview the city with my best friend. Can you help me for booking on 12/20?

ASSISTANT: Sure, do you have any fare limit?

USER: Yes, my fare limit is 500.

ASSISTANT: Help me with your return date?

USER: I will return on 12/22.

ASSISTANT: Where would you like to start your journey from?

USER: I like to start my journey from Charlotte, NC - CLT.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for your precious time, we found a flight having a single connection with number 1015 in an airline Delta. Shall I proceed to book?

USER: Ok, you can proceed for booking.

ASSISTANT: Your flight ticket has been processed.

USER: Thanks for booking in Delta airline.

ASSISTANT: Thank you for availing us. Have a nice flight.