You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, is there any help that you need?

USER: My name is Lisa Roberts and I want to cancel my reservation due to health issues.

ASSISTANT: Sure, I can help you with cancellation process and please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, I have checked your status in our previous booking but it is showing that no booking is done under your name.

USER: Ok, thank you for the information.

ASSISTANT: You are most welcome and have a nice day.