You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Gregory Hall here.

ASSISTANT: Hall, how can I aid you?

USER: My interview got postponed, so I want to reschedule my itinerary dates. Could you help me out?

ASSISTANT: Sure, I can do that for you. Let me check your reservation status.

USER: Sure.

ASSISTANT: Hall, I did not find any reservation by your name in our database.

USER: No problem, thank you.

ASSISTANT: You are welcome and have a nice day.