You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: Please, cancel my earlier reservation due to my health issues.

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Catherine Mitchell.

ASSISTANT: Sorry Catherine Mitchell, there is no reservation on your name.

USER: Ok, I think I made reservation with other airline. Thank you for help.

ASSISTANT: Thank you.