You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need a flight in a business class to Atlanta from Houston in the month of April for an event. Can you help me in booking a flight ticket?

ASSISTANT: Sure, please let me know your travelling dates.

USER: Thank you for considering my request. My travelling dates are Apr 10 and Apr 12.

ASSISTANT: Ok, Kindly mention your journey airport codes.

USER: Ok, my journey airport codes are HOU and ATL.

ASSISTANT: Ok, Do you prefer direct or connected flight?

USER: I prefer connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, No flights were found with your given requirements.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Ok, May I know your name for documentation purpose?

USER: Sure, my name is William Davis.

ASSISTANT: Ok, Thank you for choosing us.