You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation due to cancel of my seminar. Could you please help me?

ASSISTANT: Sure, may I know your name please?

USER: Andrew Lopez here.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: No problem, thank you for he information.

ASSISTANT: Thank you for reaching us.