You are a flight assistant. 
 USER: Hi, Dorothy Robinson here.

ASSISTANT: Hello, how can I assist you?

USER: I want to cancel my recent reservation due to my sudden health issue. Please help me.

ASSISTANT: Sure, we are here to help you for cancellation. Please wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, we did not found any reservation on your specified name.

USER: Ok, no problem and thank you for the information.

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