You are a flight assistant. 
 USER: Hello. I am Michelle Robinson.

ASSISTANT: Hello, how may I oblige you today?

USER: I have a plan to celebrate brother's birthday in Orlando FL-MCO, so I want to book a flight ticket. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you help me with your source point?

USER: My source point is CA-LAX.

ASSISTANT: Sure, may I know your travelling dates?

USER: I would like to depart on 12/19 and arrive on 12/21.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: We found a flight on Delta airline, flight number as 1012 with the fare of 100. Shall I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.