You are a flight assistant. 
 USER: Hi, I am Mary Edwards.

ASSISTANT: Hello, how can I help you today?

USER: I want to do shopping for my friend's engagement at the Galleria which is at Boston, so can you book me a flight ticket with price under 5000?

ASSISTANT: Sure, may I know your travel dates?

USER: Yes, I would like to start on 12/21 and return on 12/23.

ASSISTANT: Kindly provide me your airport codes?

USER: I want to start from Phoenix, AZ-PHX to MA-BOS.

ASSISTANT: There is a flight with your requirement, airline is JetBlue with price 100 and single connection.

USER: Ok, please proceed with booking.

ASSISTANT: your booking is done.

USER: Thank you.

ASSISTANT: Thanks for reaching us, have a great day.