You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Scott Campbell is here.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Wait a second.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found under name.

USER: Ok, no issues at all. Thank you.

ASSISTANT: Thank you for choosing us.