You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation which I have done a month ago, as my health is not good. Can you please help me in cancelling my reservation?

ASSISTANT: Sure, Can you please provide your name?

USER: Thank you. Previous reservation was done under the name of David Mitchell.

ASSISTANT: Sorry, David Mitchell no reservation found on your name.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.