You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Do you deal in flight booking?

ASSISTANT: Yes, we do deal flight booking services.

USER: That's great. Can you find the flight from LAS to EWR?

ASSISTANT: Sure, please provide your journey dates.

USER: My travel dates are from 12/26 till 12/28.

ASSISTANT: May I know your name please?

USER: Myself Andrew Hill.

ASSISTANT: Sorry Hill, no flights has been found based on your details.

USER: That's ok, I prefer any other source to reach my destination.

ASSISTANT: Thank you for using our service. Have a nice day.

USER: Thank you for your information.