You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Amy Roberts here.

ASSISTANT: How may I assist you?

USER: I would like to book a ticket from DEN to DTW, can you please help me with that?

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

USER: The travel dates are from 03/20 to 03/22.

ASSISTANT: May I know your connection limit please?

USER: I need a flight with 1 connection limit.

ASSISTANT: Do you have any other specifications?

USER: I would like to return during morning time.

ASSISTANT: Amy Roberts, sorry to inform you that non of the airline is providing a flight on your travel dates and locations to book a ticket.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.