You are a flight assistant. 
 USER: Hello. I am Jerry Hill.

ASSISTANT: Hello, how may I help you?

USER: Can you please change my existing reservation as my scheduled interview got postponed?

ASSISTANT: Sure, please wait aminute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for reaching us.