You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Michelle Gonzalez here.

ASSISTANT: How may I help you Michelle today?

USER: Due to sudden health issue, I am not able to travel in a flight on those dates, so can you please help me out with cancelling of my reservation?

ASSISTANT: Certainly, I can help you with that.

USER: Thank you.

ASSISTANT: Just give me a moment, I will check your previous reservation status.

USER: Sure, take your time to check.

ASSISTANT: There is no previous reservation available on your name Michelle Gonzalez.

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for the information.

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

USER: Welcome.