You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Hall. I want to book a flight ticket from IAD to DTW. Could you help me in booking?

ASSISTANT: Sure, please share your travelling dates.

USER: My travelling dates are from Aug 18 - 20.

ASSISTANT: Ok, do you need any halt in between the journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, please check with the depart time should be in the afternoon.

ASSISTANT: Sure. Sorry, there are no flights found on your requested dates.

USER: That's ok, n problem. Thank you.

ASSISTANT: Thank you for reaching us.