You are a flight assistant. 
 USER: Hello, my name is Katherine Martinez.

ASSISTANT: Hello, how can I help you today?

USER: Me and my friend are planning to enjoy beers festival at Las Vegas, NV-LAS. Can you please help me in booking a flight ticket from EWR?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My schedule dates are from 03/03 to 03/05.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flights found with your given details.

USER: That's not a problem. Thanks for your information.

ASSISTANT: Thank you for opting us.