You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Catherine Edwards. I am planning to visit Detroit to meet my friend, can you please help me in booking a flight ticket from IAD to DTW?

ASSISTANT: Sure, when would you like to depart and return?

USER: I am planning to start my journey on 12/24 and return back on 12/26.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need one halt in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: My return time is afternoon.

ASSISTANT: Ok. Sorry, there are no flights found with your given dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.