You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I want to book a flight ticket from DTW to ORD. Could you help me in booking?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from June 21 - 23.

ASSISTANT: Can you please share your connection limit?

USER: Laura Gonzalez. I prefer for direct flight.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the evening.

ASSISTANT: Laura Gonzalez, there are no flights available in your route.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.