You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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 can help you and can I know your name please?

USER: Sure, my name is Stephen Harris.

ASSISTANT: Please allow me a moment.

USER: Sure, I will wait.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you.