You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Due to my health issue I want to cancel my reservation which I have done before.

ASSISTANT: Ok, may I know your good name please?

USER: Myself Amanda Thomas.

ASSISTANT: Sorry Thomas, no reservation has been found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you for the information.