You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you aid me to book a flight ticket from PHX to DTW?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are Oct 20 and Oct 22.

ASSISTANT: Do you have any other specifications?

USER: I prefer for direct flight and economy class to travel.

ASSISTANT: Please help me with your name for booking.

USER: Michelle Rodriguez here.

ASSISTANT: I am sorry no flights found on your route.

USER: No issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you.