You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you please help me in changing my reservation?

ASSISTANT: Sure, may I know your name?

USER: Myself Justin Green.

ASSISTANT: Thanks for providing your name, we found a reservation on your name. Can you please share your travelling dates?

USER: My travel dates are from 12/08 to 12/10.

ASSISTANT: Please share your airport codes.

USER: My airport codes are from PHX to ATL.

ASSISTANT: Let me know your connection limit.

USER: I want a single connection.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Please share your airline preference.

USER: No.

ASSISTANT: Let me know your depart and arrival timings.

USER: I would like to prefer my depart time in the afternoon.

ASSISTANT: We found a direct flight and Delta airline with flight number 1012. Shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed and your depart time is 19:00.

USER: Thank you.

ASSISTANT: Thank you for choosing us.