You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I need your help in cancelling my ticket. As I have cancelled my trip due to the sudden health issue. Can you help me in that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Let me know your name to check your reservation?

USER: Sure, Richard Martinez is my name.

ASSISTANT: Please wait a while.

USER: Sure, make it as soon as possible.

ASSISTANT: Thank you for waiting. I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: That's ok, Not an issue. Thanks for your service.

ASSISTANT: Thank you for reaching us.