You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Davis.

ASSISTANT: Davis, how can I aid you today?

USER: I am planning for a round trip, could you please help me with booking a flight ticket from PHX?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: I would like to take off on 05/22 and return on 05/24.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Sure, take your time.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 100. Shall I proceed?

USER: Please confirm the booking.

ASSISTANT: Your ticket has been booked with 1021 flight number.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.