You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Rebecca Harris here, due to my health issue I want to cancel my reservation. Please, aid me about it.

ASSISTANT: It's ok. Please wait for a moment, let me check your reservation details.

USER: Ok, fine.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: Ok, fine it might not be done properly at the time of booking. Anyway thank you for the help.

ASSISTANT: Thank you and get well soon, take care.