You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Howe can I assist you now?

USER: In the last month I have reserved a flight on my name to travel to San Francisco to celebrate my father birthday but suddenly there is an examination on the same date our college management has informed suddenly to us. So I will travel to my home on some other dates. Can you please help me in changing my flight ticket booking?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your name please to check your reservation status?

USER: My name is Justin Martin.

ASSISTANT: Sorry Justin Martin, no reservation has found under your name to change.

USER: Not an issue with that one, I think it is not booked properly on my name. Anyways, thank you for your quick search and great service.

ASSISTANT: Thank you for choosing us, have a good day.