You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Actually, I got admitted in a hospital due to some health issues.So I prefer not to travel, could you help me in cancelling my reservation?

ASSISTANT: Sure, I will be happy to help you.

USER: Thanks.

ASSISTANT: May I know your name for searching your previous reservation?

USER: My name is Margaret Harris.

ASSISTANT: Sorry to tell you, there is no reservation found with your name in our reservation list.

USER: It's ok, thank you.

ASSISTANT: Margaret Harris, thank you for choosing our agency.

USER: My pleasure.