You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in changing my existing reservation?

ASSISTANT: Sure, may I know your name for the changing process?

USER: I am George Hernandez.

ASSISTANT:  Sorry, no activate reservation found on your name with our database.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Welcome, thank you for reaching us.