You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself Richard Young.

ASSISTANT: Yes, Young.

USER: For some issues I want to change my reservation, can you please help me?

ASSISTANT: Sure, I will help you out. Please wait a moment.

USER: Sure.

ASSISTANT: Sorry Young, no reservation found on your name in our data.

USER: It's ok. Thank you for the information.

ASSISTANT: Welcome.