You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jonathan Martinez. I have a plan to buy a new house in Las Vegas, can you please help me in booking a flight ticket?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My trip dates are from 08/29 till 08/31.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are from EWR to LAS.

ASSISTANT: Sorry, there is no flight is found on your route.

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

ASSISTANT: Welcome. Have a nice day.