You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am Andrew Scott. Can you please help me to find a flight from DTW to DCA?

ASSISTANT: Sure Andrew Scott, I am happy to help you with that.  Can I have your travel dates please?

USER: Thank you. I am willing to travel on the dates of July/20 and July/22.

ASSISTANT: Ok, please let me know the timings of your journey.

USER: The return time of the flight should be in the afternoon.

ASSISTANT: Ok, do you have any other preferences?

USER: The connection limit of the flight must be at least 1.

ASSISTANT: Sorry Andrew Scott, no afternoon flight is available to you on your dates.

USER: It's ok, not a problem with that. Thank you for your help.

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