You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Actually I want to cancel my recent reservation, because my project submission dates are changed for now. So please help me to find my existing reservation and cancel it.

ASSISTANT: Sure, I will definitely help you with that. For sure I need your name so that I can help you easily.

USER: My existing reservation is with name Lisa Mitchell.

ASSISTANT: Actually, there is no reservation found on your name Lisa Mitchell.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.