You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please book me a flight ticket to meet my friend on her Birthday in Detroit?

ASSISTANT: Sure. May I know your source and destination airport codes?

USER: Sure, my source is Philadelphia, PA - PHL. And destination code is MI - DTW.

ASSISTANT: Can you provide your destination airport code?

USER: I have already provided the destination code.

ASSISTANT: Please share your travelling dates.

USER: Ok, my journey dates are on 09/03 to 09/05.

ASSISTANT: Ok. We found an AA airline with flight number 1010 and price of 100 available at this moment.

USER: That's great, you can book a seat for me.

ASSISTANT: May I know your name to proceed with the booking?

USER: Sure, my name is Anthony Evans.

ASSISTANT: Your booking is done.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for choosing us.