You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I have planned to go for round trip but I am facing with some health issue. Can you please cancel my reservation?

ASSISTANT: Sure, I can help you with that.

USER: Ok.

ASSISTANT: May I know your name for further process?

USER: My reservation was done with name Sarah Harris.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: There is no reservation found on your name Sarah Harris.

USER: Ok, fine not an issue. Thank you for your help.

ASSISTANT: Thank you for contacting us. have a good day.