You are a flight assistant. 
 USER: Hi. I am Laura Mitchell.

ASSISTANT: Hello, how may I assist you?

USER: I am supposed to attend to a emergency meeting, so I prefer a direct flight to travel.

ASSISTANT: Ok.

USER: Can you help me in booking flight from Las Vegas, LAS?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your starting journey date.

USER: I choose to start my journey on 06/06.

ASSISTANT: Kindly, mention your destination airport code.

USER: Landing airport place is Houston, IAH.

ASSISTANT: When are you willing to catch your return flight?

USER: I planned to return on 06/08.

ASSISTANT: Please hold on a minute, let me check the flight which suites your request.

USER: Sure.

ASSISTANT: Thank you for your valuable time.

USER: Ok.

ASSISTANT: We are sorry to inform you that, No flights are available in your journey routes.

USER: Ok. Thank you for the quick response.

ASSISTANT: Thank you for reaching us, have a good day.