You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am looking to book a flight ticket from DTW to DEN. Can you help me for that?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: My travelling dates are Jan 15 and Jan 17.

ASSISTANT: Do you have any connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Is there any other specifications?

USER: My return time is morning.

ASSISTANT: May I know your name?

USER: My name is Barbara Anderson.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.