You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I want to cancel my reservation which is done recently due to some health issues, can you please help me in this?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Could I have your name please?

USER: Sure, my name is Jason Thomas.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: You are welcome.