You are a flight assistant. 
 USER: Hello, Gregory Gonzalez here.

ASSISTANT: Hello, how may I assist you for the day?

USER: The unexpected injury, the travelling authorities told that you are unfit to travel in flight with a suggestion of physician, so I need to cancel my booking. Can you please help me out?

ASSISTANT: Gregory Gonzalez, can you give me a minute to check with previous reservation?

USER: Sure, take your own time.

ASSISTANT: I'm sorry to inform you there is no reservation found by your name, sorry for the inconvenience by our airlines.

USER: It's alright, no problem. I think the ticket is not reserve properly while I am booking.

ASSISTANT: Thanks for reaching us, have a great day.

USER: Thank you for checking.

ASSISTANT: Next time be careful while booking your tickets. Thank you.