You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

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

ASSISTANT: How can I help you today? Sure.can I have your name please?

USER: My name is Gary Evans.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your own time.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.