You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know how best I can help you today?

USER: I need to book a flight ticket from IAH to ATL.

ASSISTANT: Sure, we are happy to help you. Help me with your journey dates, so that it will be easier to move further in booking.

USER: Sure, my journey dates are Sep 1 and Sep 3.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer maximum one connection.

ASSISTANT: May I know your name please?

USER: Sure, Jonathan Anderson here.

ASSISTANT: Can I know if you have any class preference?

USER: I want to fly in a economy class.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I would prefer depart time at evening.

ASSISTANT: Let me check the availability of flights and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for approaching us.