You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know, What help I can do?

USER: Due to my health problem I want to cancel my reservation, can you help me to cancel my reservation?

ASSISTANT: Sure, to check with cancellation, I need your name.

USER: My name is Emily Harris.

ASSISTANT: Thanks. Emily Harris, your name is not in reservation list to cancel.

USER: Ok, no problem.

ASSISTANT: Thanks for availing us, Have a nice day.

USER: Thanks for your good response.