You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jacob Phillips here.

ASSISTANT: Phillips, how may I guide you?

USER: I want to change my reservation as I have some important work at my office, can you please help me?

ASSISTANT: Sure, I will help you with that. Let me check your reservation status in our database.

USER: Sure.

ASSISTANT: Jacob, sorry to inform, no reservation is found on your name in our records.

USER: No problem, anyway thank you for checking.

ASSISTANT: You are welcome.