You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Barbara Roberts. Owing to emergency, I want to cancel my recent reservation. Could you please help me in that?

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Thanks for your time, there is no reservation found on your name to change it.

USER: Ok, thanks for your information.

ASSISTANT: Thanks for choosing us, have a good day.