You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I need to book a ticket from Detroit to New York.

ASSISTANT: Sure, May I know the travelling dates?

USER: Travelling dates are July, 20 to July, 22.

ASSISTANT: Please help me with your journey codes.

USER: Sure. My airport codes are DTW and EWR.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Edward Lopez.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Thank you.

ASSISTANT: Thank you for availing us.