You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Miller.

ASSISTANT: How may I assist you?

USER: I am planning to attend music concert at OAK, can you please help me with booking a flight ticket from PHX?

ASSISTANT: Sure, may I know your travel dates?

USER: Sure, I would like to take off on Sept 18 and return on Sept 20.

ASSISTANT: Do you have any specifications? We found a economy flight on your details with airline Spirit, flight number: 1001.

USER: Yes, please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you.

USER: You are welcome.