You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Rebecca Lee.

ASSISTANT: How may I help you, Lee?

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

ASSISTANT: Oh! ok, let me check your reservation details.

USER: Ok.

ASSISTANT: There is no reservation found on your name to do cancellation, Lee.

USER: Ok, no issues. Thank you for your services.

ASSISTANT: Thank you for choosing us, take care of your health.