You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Could you please book a flight ticket from DTW to BOS?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are Sept 10 and Sept 12.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a single connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: I want to depart in the afternoon and return in the morning.

ASSISTANT: Please mention your name.

USER: My name is Kathleen Miller.

ASSISTANT: There are no flights found under your preferable details.

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

ASSISTANT: Welcome, have a great day.