You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you now?

USER: I am Gregory Martin.

ASSISTANT: Ok.

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed.

ASSISTANT: Ok.

USER: Can you aid me to change?

ASSISTANT: Sure. Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your time, we did not find any reservation with your name.

USER: Ok, not an issue. Thanks for your assistance.

ASSISTANT: Thank you for contacting us.