You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Brian Smith. I have a plan to visit San Francisco. Can you please book me a flight ticket to visit Twin Peaks?

ASSISTANT: Sure, may I know your source and destination airport codes?

USER: Source is from PHL and destination is to SFO.

ASSISTANT: Ok, when would you like to depart and return?

USER: I want to depart on 01/03 and need to catch return flight on 01/05.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a JetBlue airline, flight number: 1004, price: 100 with one connection.

USER: Ok, proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the assistance.

ASSISTANT: Thank you, have a good day.