You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me to book my ticket from IAD to DTW?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My trip dates are Dec 1 and Dec 3 respectively.

ASSISTANT: Ok, please mention your name.

USER: Benjamin Adams here.

ASSISTANT: May I know your connection limit?

USER: I prefer for single connecting limit.

ASSISTANT: Do you have any specification?

USER: My arrival should be in the afternoon.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us, have a nice day.