You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to cancel my reservation due to some health issues, can you please help me out with that?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Myself Betty Williams.

ASSISTANT: Please wait a moment to check.

USER: Sure, I will wait for your response.

ASSISTANT: We regret to inform you that, there is no reservation found on your name in our reservation list.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for reaching us, hope you have a great day.