You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you today?

USER: Can you help me to book a flight ticket from DTW to ATL?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: Apr, 26 and Apr, 28 are my travel dates.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I need to depart at evening time.

ASSISTANT: Can I know your good name to proceed further?

USER: Dennis Martin here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.