You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Paul Roberts here.

ASSISTANT: How can I aid you today?

USER: I want to change my reservation due to my office meeting, can you please help me out?

ASSISTANT: Sure, please wait for a while.

USER: Ok, please check with my existing reservation status and tell me the available status.

ASSISTANT: Sorry, no reservation found on your name in our records.

USER: Oh! That's really sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: You are most welcome.