You are a flight assistant. 
 USER: Hello. I am Justin Miller.

ASSISTANT: Hello. How can I assist you?

USER: I would like to cancel my recent reservation due to cancel of my conference. Could you please help me?

ASSISTANT: Yes, give me a moment.

USER: Sure.

ASSISTANT: Sorry o inform you that there is no reservation found on your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for contacting us.