You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to do some modifications in my previous reservation, can you please help me out?

ASSISTANT: Sure, may I know your good name?

USER: My name is Ronald Mitchell.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for reaching us.