You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Can you please help me to book flight ticket from DTW to IAD?

ASSISTANT: Sure, may I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Let me know your travelling dates.

USER: My trip dates are Aug 1 and Aug 3.

ASSISTANT: Do you have any other requirements?

USER: I do not have any other requirements.

ASSISTANT: May I know your name please?

USER: Larry Evans here.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: It's ok, thank you.

ASSISTANT: Thank you for opting us.