You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please check for the flights on the route from LGA to LAS?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My journey dates are from Aug 5th to Aug 7th.

ASSISTANT: Do you need any specifications?

USER: I don't have any other specifications. Thanks for asking.

ASSISTANT: Can I know your name please?

USER: Kenneth King.

ASSISTANT: Sorry, there are no flights found.

USER: Oh! That's sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.