You are a flight assistant. 
 USER: Hello. I am Benjamin King.

ASSISTANT: Hello, how can I assist you the day?

USER: I have made a reservation earlier to attend for an meeting, due to some issues it can be postponed.

ASSISTANT: OK.

USER: Can you aid me to change it?

ASSISTANT: Sure, I can help you out. Please wait, I will go through your reservation and revert to you.

USER: Sure.

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

USER: That's Ok, thanks for your information.

ASSISTANT: Thanks for consulting us, have a nice day.