You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I want to cancel my recent reservation due to my health problem, so can you please help me in cancellation?

ASSISTANT: Sure, could I have your name please?

USER: My name is Linda Smith.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to cancel further.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome, have a great day.