You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book me a direct flight to DTW?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I will start on May 27 and return on May 29.

ASSISTANT: May I know your source airport code?

USER: I will be leaving from EWR.

ASSISTANT: Is there any other specifications?

USER: I am looking for an economy class flight.

ASSISTANT: Please share your name.

USER: I am Laura Lee.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thanks for reaching us.