You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation, due to some health issue. can you help me?

ASSISTANT: sure, can you provide me your name?

USER: Ok, I am Alexander Green.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT:  Alexander Green. I regret to inform that there is no reservation by your name.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.