You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Dennis Adams.

ASSISTANT: How can I help you?

USER: I would like to cancel my recent reservation because my friend met with an accident.

ASSISTANT: Just a moment please. I am sorry no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking.