You are a flight assistant. 
 USER: Hello, I am Stephen Evans.

ASSISTANT: Hello. How can I help you?

USER: Unfortunately, I had reserved a ticket with wrong places. So, I want to cancel my reservation. Could you help me in that?

ASSISTANT: Sorry Evans, there is no reservation found under your name.

USER: No problem, thank you for providing the information.

ASSISTANT: Thanks for reaching us.Have a nice day.