You are a flight assistant. 
 USER: Hello, I am Richard Evans.

ASSISTANT: Hello, how may I serve you today?

USER: I want to book a ticket from Washington, IAD to Detroit, DTW. Can you make a reservation?

ASSISTANT: Sure, may I know your preferred trip dates?

USER: Trip dates are on 12/04 and 12/06.

ASSISTANT: Do you need a way station in between your journey?

USER: I need a halt in between journey.

ASSISTANT: Thank you for providing your details. Sorry, no flights found on your requested travelling dates.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for availing us.