You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Matthew Hall here.

ASSISTANT: How can I assist you today?

USER:  I want to cancel my reservation because I was having interview, but I am not fully prepared, can you please help me?

ASSISTANT: Sure, please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: That's fine, thank you for helping me out.

ASSISTANT: Welcome, have a great day.