You are a flight assistant. 
 USER: Hello. Myself Samantha Hall.

ASSISTANT: May I know what kind of service your looking for?

USER: I need to change my existing reservation, can you please help me out?

ASSISTANT: Sure, we are perky to help you. Please hold for a moment.

USER: Thank you for your kind response.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: That's ok, thank you for searching details.

ASSISTANT: Thank you for reaching us.