You are a flight assistant. 
 USER: Hello. I am Mark Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I want o cancel my reservation due to my friend has been met with accident.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: There is no reservation found with your name.

USER: Ok, thanks for assisting me.

ASSISTANT: Thank you for reaching us.