You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to cancel my recent reservation due to my health issue, so can you help me with this?

ASSISTANT: Sure, may I know your name for the cancellation process?

USER: Sure, Debra Anderson is my name.

ASSISTANT: Sorry Anderson, we regret to inform you that there is no reservation found  for the cancellation.

USER: Not a problem, thank you for checking.

ASSISTANT: Welcome, thank you for reaching us.