You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Scott Mitchell here.

ASSISTANT: How can I assist you at this moment?

USER: Can you change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry Scott, there is no reservation found under your name.

USER: It's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you to inform me.

ASSISTANT: Welcome.