You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: David Davis here.

ASSISTANT: Davis, how can I help you?

USER: My interview got postponed, so I want to reschedule my itinerary dates.

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

USER: Sure.

ASSISTANT: Davis, I have not found any reservation by your name in our database.

USER: It's ok, thank you.

ASSISTANT: You are welcome and have a nice day.