You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Help me in booking a flight from PHX to ATL?

ASSISTANT: Sure, can you share your trip dates?

USER: I like to travel on Apr 21 to 23.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connection flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: I am Barbara Carter.

ASSISTANT: We found a connecting flight of fare 200 with airline United and number 1020. Can I book?

USER: Proceed for booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you.