You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to postpone of my event. Could you please help me?

ASSISTANT: Sure, on whose name it was reserved?

USER: I am Nancy Rodriguez.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, We found a reservation in your name. Can I have your airport codes?

USER: Sure, my airport codes are LAX and BOS.

ASSISTANT: Help me with the trip dates?

USER: My travelling dates are Jan 3 and Jam 5.

ASSISTANT: Do you have any preferences?

USER: Yes, I want to return in the afternoon.

ASSISTANT: We found a flight in an airline United with 1022 number having a single connection price of 100 which is having it's return time in the afternoon at 14hrs. Shall I proceed to book?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us. Have a safe flight.