You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I need to attend a seminar at Houston, can you help me to book a flight ticket from ATL to IAH?

ASSISTANT: I am glad you have contacted us for the assistance. I will help you.

USER: Thank you.

ASSISTANT: Please help me with your planned travelling dates.

USER: My travel dates are May 08 and May 10.

ASSISTANT: Please help me with your preference regarding the class that you wish to fly.

USER: I am comfortable with any class.

ASSISTANT: Do you need a direct or connecting flight to reach your destination?

USER: I prefer connecting flight for this trip.

ASSISTANT: In order to help you better, please let me know if you have any other preferences in your journey.

USER: No, thanks for asking.

ASSISTANT: Please allow me a minute.

USER: Sure.

ASSISTANT: Please help me with your name.

USER: I am Benjamin Wright.

ASSISTANT: Benjamin Wright, I am really sorry to inform you that there are active flights assigned in your preferred route of journey. So I am unable to book a flight ticket as per your requirement.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us. Have a great time.