You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have some personal matters that need fixing so I need to cancel my recent reservation. Can you please help me?

ASSISTANT: Sure, may I name your name?

USER: My name is David Martin.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's not a problem. Thank you.

ASSISTANT: Thank you for reaching us.