You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from IAD to DTW?

ASSISTANT: Sure, let me know your travelling dates.

USER: Sure, my travel dates are from June 03 to June 05.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any specifications?

USER: I would prefer normal-cost airlines for my journey.

ASSISTANT: May I know your name?

USER: Dennis Moore here.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.