You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am George Davis. Can you please help me to change my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: There is no reservation found under your name to change.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for opting us.