You are a flight assistant. 
 USER: Hello, I am Ruth King.

ASSISTANT: Hello, how may i assist you today?

USER: I need to book a direct flight, Can you please help me for booking?

ASSISTANT: Ok, I am glad to help you. When your willing to travel?

USER: I would like to travel on 07/26 to 07/28.

ASSISTANT: May I know your airport codes?

USER: My source point is ATL to IAH.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there is no flights found on your requested dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you choosing us.