You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation, due to some work at my office.

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Can you please share your good name to proceed further?

USER: I am Samuel Wilson.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: There is no reservation found on your name in our database to change it.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for availing us.