You are a flight assistant. 
 USER: Hello, I am Rachel Martin.

ASSISTANT: Hello, How can I serve you today?

USER: I just want to cancel my recent reservation due to sick, so can you help me for cancellation?

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found with this name.

USER: OK, Thanks for your information.

ASSISTANT: Have a Great day.