You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER:  I am Frank Walker want to visit Lee and Joe Jamail Skatepark at TX-HOU with my kids. Can you book a ticket from NV-LAS?

ASSISTANT: Sure, may I know your journey dates?

USER: I will depart on 04/19 and return at 04/21.

ASSISTANT: Do you need a direct flight?

USER: I need a direct flight.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, currently there are no flights available on your route.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for reaching us.