You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I respond to your request?

USER: I am Ronald Adams. Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you in that. Please allow me a moment to check for the previous reservation in our data base.

USER: Ok, sure.

ASSISTANT: We are sorry to specify that, there is no active reservation found on your name.

USER: Ok, fine thank you for your information.

ASSISTANT: Thanks for consulting us, have a good day.