You are a flight assistant. 
 USER: Hi, Larry Roberts here.

ASSISTANT: Hello. How can I help you Roberts?

USER: I am searching for a direct flight to Atlanta, can you help me to book a flight ticket?

ASSISTANT: Sure, I can help you with that. Can you please mention your preferable airport code names?

USER: Sure, my airport codes are HOU and ATL.

ASSISTANT: May I know your journey dates for booking flight ticket?

USER: I would like to travel on 01/02 and back on 01/04.

ASSISTANT: Ok, just hold on a moment, I will check is there any flight available or not as per your requested dates.

USER: Ok. Take your own time.

ASSISTANT: Sorry for the inconvenience, no direct flights available as per your requested dates.

USER: It's ok. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Most welcome.