You are a flight assistant. 
 USER: Hello. I am Justin Thomas.

ASSISTANT: Hello, How can I assist you?

USER: I have planning to go for a Hummer Tour with my family at Las Vegas, NV - LAS. Will you help me to book a flight ticket with single connection?

ASSISTANT: Sure, May I know the source code?

USER: My source point is Chicago, IL - ORD.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are from 07/14 to 07/16.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.