You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Nancy Wright. I want to change my travel dates in my previous reservation so can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you for your response.

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

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a nice day.