You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you?

USER: I am James Evans. Can you please find a evening flight to attend a event in Houston?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: My journey dates are, depart on Sep 13th and arrival  on Sep 15th.

ASSISTANT: Do you prefer any way station in your journey?

USER: Yes, I prefer a way station in between journey.

ASSISTANT: Can you share me your source point?

USER: My source airport code is DCA.

ASSISTANT: Is there any other requirements for you?

USER: No.

ASSISTANT: May I know your landing airport code?

USER: My destination airport code is HOU.

ASSISTANT: Thank you for sharing the details.

USER: Ok.

ASSISTANT: We are sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us, have a good day.