You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

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

ASSISTANT: Sure, I am glad to help you in cancelling your reservation. Please, share me your good name to check your reservation status.

USER: Thank you, my name is David Taylor.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that, we have not found any active reservation on your name in our database.

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

ASSISTANT: Thank you for reaching us, have a good day.