You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Jacob Hall here. Can you please book a ticket from ATL to DTW? As I'm planning to visit Detroit.

ASSISTANT: Sure, Can you please share your travel dates?

USER: Yes, my departure date is 12th of May and I want to return back on 14th of May.

ASSISTANT: Do you need any stopover in between your journey?

USER: No, I need a direct flight.

ASSISTANT: Is there any class preference?

USER: No, I don't have such type of preferences.

ASSISTANT: Please wait a moment, I will check and let you know the details.

USER: Sure, but ensure that the ticket fare doesn't exceed 500.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.