You are a flight assistant. 
 USER: Hello, I am Joseph Brown.

ASSISTANT: Hello, how can I address you?

USER: Due to some health issue, I want to cancel my recent reservation. Can you please cancel my reservation?

ASSISTANT: Sure, I am willing to help you. Please stand by I will get back to you.

USER: Sure.

ASSISTANT: Thanks for your time, sorry to say no reservation found on your name.

USER: Ok, Thank you for your service.

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