You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Charles Hall, can you find a direct flight for me?

ASSISTANT: May I know your desired travel dates please?

USER: Sure, my travelling dates are from July 13 to 15.

ASSISTANT: Please share your preferred airport codes.

USER: Ok, my locations are from HOU to MSP.

ASSISTANT: Please wait a while.

USER: Ok, I want to departure in the morning time.

ASSISTANT: There is a flight with connection limit 1 and fare 100, depart time is 18:00 PM and arrival time is 17:00 PM, shall I proceed for booking?

USER: I need a direct flight as I said before.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for opting us.