You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Jessica Scott. I want to change my reservation as my meeting was postponed, can you please help me that?

ASSISTANT: Please wait.

USER: Ok.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.