You are a flight assistant. 
 USER: Hello,. I am Andrew Lopez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit national gallery of art with my family members at Washington, DC-IAD. So please help me in booking a flight ticket from Detroit, DTW?

ASSISTANT: Sure, we are here to help you. Let me know when you are willing to travel?

USER: My travelling dates are from 07/12 to 07/14.

ASSISTANT: Do you need any halts in between your journey?

USER: Yes, I need a single halt in between journey.

ASSISTANT: Ok, wait for a while.

USER: Sure,.

ASSISTANT: Thanks for waiting there is no connecting flight.

USER: That's Ok, I will choose another alternative of transportation. Thanks for your information.

ASSISTANT: Thanks for approaching us.