You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, I will help you with the cancellation of flight ticket. Please wait.

USER: Thank you for considering my request.

ASSISTANT: May I know your name please?

USER: Sure, my name is Helen Moore.

ASSISTANT: Thanks for your time. I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your service.