You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you?

USER: On my name Gary Perez reserve a seat to Las Vegas, LAS to visit Adventure home. I need a direct flight.

ASSISTANT: Sure, Can I know your travelling dates?

USER: 11/04 - 11/06 are my trip dates.

ASSISTANT: May I know your preferable airport codes?

USER: Boarding airport is Houston, HOU.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requriments.

USER: Ok. no issues. Thank you for sharing the information.

ASSISTANT: Thank you.