You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me to change it?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: Sure, my name is Benjamin Allen.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us, we hope see you again.