You are a flight assistant. 
 USER: Hi. I am Jason Davis.

ASSISTANT: Hello, what can I do for you?

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 out?

ASSISTANT: Sure, I will help you. May I know that are you willing to cancel or modify your reservation?

USER: I want to modify my reservation.

ASSISTANT: Okay, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, we could not find any reservation on your name.

USER: No issues, thanks for your response.

ASSISTANT: Thank you for contacting us.