You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to my health issues, could you help me in cancelling my reservation?

ASSISTANT: Sure, I am happy to help you. Can I have your good name?

USER: I am David Parker.

ASSISTANT: Sorry, we did not find any active reservation on your name in our data.

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

ASSISTANT: Thank you for availing us.