You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Ryan Williams here. I want to book a flight ticket on the route from LAS to EWR, can you help me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My travelling dates will be from 07/23 to 07/25.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route. Sorry, there are no flights available on your requested dates.

USER: Oh! That's fine, thank you for checking with available flights.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are most welcome.