You are a flight assistant. 
 USER: Hi. My name is Gary Hall.

ASSISTANT: Hello, how may I aid you today?

USER: Due to health issue, I need to cancel my recent reservation. Please help me with that.

ASSISTANT: Sure, we are here to assist you.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry to say that there is no active reservation on your name to cancel.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.

USER: Most Welcome.