You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is David Lopez. Can you please book me a ticket from DTW to DCA, as I have to attend a meeting there?

ASSISTANT: Sure, please share me your planed journey dates?

USER: My planned trip dates are Jan 13th and 15th.

ASSISTANT: Please mention your connection limit?

USER: I want to fly on a direct flight.

ASSISTANT: Please wait for a moment.

USER: Make sure that mt depart time is in afternoon and return time is in the morning.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: Ok, that's fine. Anyways, thank you for the information.

ASSISTANT: Thank you for visiting us, have a nice day ahead.