You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I am planning to book a ticket from DTW to IAD to attend workshop, can you help me in booking?

ASSISTANT: I am here to help you about that. Can you please provide your planned dates of journey?

USER: I am departing on Sep 27 and return on Sep 29.

ASSISTANT: Would you like to travel in a direct flight or in a connecting flight for your journey?

USER: I want a flight with connection limit 1.

ASSISTANT: Please provide your name in order to book the ticket.

USER: My name is Paul Turner.

ASSISTANT: I regret to say this Paul Turner, there are no flights which travels to your route.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome, thank you for reaching us.