You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my reservation as my trip dates got changed, can you please help me in changing?

ASSISTANT: Sure, may I know your good name?

USER: I am Dorothy Young.

ASSISTANT: We found a reservation on your name, can you please share me your travelling details?

USER: My travel dates are from 01/20 to 01/22. My airport codes are from NC-CLT to CA-OAK.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We found a flight on your details with airline UA , flight number 1014. Shall I book this ticket?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your great service.

ASSISTANT: Thank you so much for choosing us.