You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Nicholas Evans.

ASSISTANT: Nice to meet you Nicholas.

USER: I am planning to cancel my recent reservation, due to health issue. Can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you.