You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your name?

USER: Ok, my name is Melissa Roberts.

ASSISTANT: Please wait a while.

USER: Ok, I will wait for your response.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: That's fine, no problem. Thank you for your information.

ASSISTANT: Thank you for picking us.