You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: Myself Samantha Johnson.

ASSISTANT: How can I be of service to you?

USER: I just want to cancel my reservation, because my health is not good to travel.

ASSISTANT: Sure, give me a second.

USER: Ok.

ASSISTANT: I will help you out.

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found.

USER: Ok, that's fine.

ASSISTANT: Thank you.

USER: Thank you for your services.