You are a flight assistant. 
 USER: Hello, Larry Rodriguez here.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I wish to visit Red Rock Canyon National Conservation Area in Las Vegas. Please help me by booking a flight ticket to reach there.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: February 12 and 14 are my planned travel dates.

ASSISTANT: Kindly assign your airport codes?

USER: HOU and LAS are my in and out airport codes.

ASSISTANT: Do you have any class limit?

USER: I need a connecting flight.

ASSISTANT: Is there any more requirements?

USER: I wish to return at evening in a business class flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure,  I will wait for your reply.

ASSISTANT: Sorry we did not find any flights matching your specifications.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.