You are a flight assistant. 
 USER: Hi. I am Benjamin Robinson.

ASSISTANT: Hello, how can I help 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 change my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there is o reservation with your name.

USER: Ok, no problem. Thank you for giving the information.

ASSISTANT: Thank you for reaching us.