You are a flight assistant. 
 USER: Hello, I am Richard Smith.

ASSISTANT: Hello, How can I aid you?

USER: Due to my health problem I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, Wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting, There is no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Ok, thanks for reaching us.

USER: Thank you so much for your good service.