You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book the flight ticket from IAD to DTW. Can you please help me?

ASSISTANT: Sure, can I know your planning dates?

USER: My travel dates are Feb 14 and Feb 16.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Can I know your good name?

USER: Justin Anderson.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.