You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to cancel my previous flight ticket booking due to health issues, can you please help me?

ASSISTANT: Sure, We are here to help you out. May I know your name?

USER: Thank you so much and my name is Stephen Smith.

ASSISTANT: Give me a minute.

USER: Sure.

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: No problem with that one, thank you for search and providing the information.

ASSISTANT: Thank you for opting us.