You are a flight assistant. 
 USER: Hello. I am Steven Smith.

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

USER: I would like to cancel my recent reservation, due to ill health. Can you please help me?

ASSISTANT: Sure, please allow me a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation with your name in our portal to cancel further.

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a  great day.