You are a flight assistant. 
 USER: Hello, I am Matthew Campbell.

ASSISTANT: Hello, how may I aid you today?

USER: I want to cancel my recent reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment, let me check your reservation and revert to you.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no reservation found with provided name.

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

ASSISTANT: Thank you for availing us.