You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Brandon Campbell. I am planning for the trip to Las Vegas. Can you please help me to search a flight from New York?

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

USER: Thank you. My planned travel dates are 03/16 and 03/18.

ASSISTANT: Can you please share your source and destination airport codes?

USER: Ok, I want to start my journey from the airport EWR to LAS.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok, thank you for checking the flight.

ASSISTANT: You are welcome.