You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Evans.

ASSISTANT: How may I assist you?

USER: I want to cancel my recent reservation due to an emergency work, can you please help me with that?

ASSISTANT: Yes, I can help you.

USER: Thank you.

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

USER: Not an issue, thank you.

ASSISTANT: Thank you for contacting us.