You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what kind of help get from me?

USER: Due to the sudden illness of my grandad, I am unable to catch a flight. So I had a request to you to cancel my recent reservation?

ASSISTANT: Sure, please help me with your name to cancel a reservation?

USER: Sure, David Gonzalez here.

ASSISTANT: Sorry, there were no reservation found with the given name.

USER: Ok, no issues. Thanks for serving me.

ASSISTANT: Thank you for reaching us.