You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Joseph Robinson, I have planned a Hummer tour at Las Vegas , LV - NAS with my family.

ASSISTANT: OK.

USER: Could you please help me in booking a ticket with a price limit 1000?

ASSISTANT: Sure, I am happy to help you.

USER: Ok.

ASSISTANT: May I know your travel dates to check availability of flights?

USER: Ok, my travelling dates are 03/05 and 03/07.

ASSISTANT: Ok, From where you want to fly from?

USER: My source airport is Houston, TX - HOU.

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

USER: Ok, no problem.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.