You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, what can I do for you today?

USER: Can you please help me in booking  my flight ticket from LAS to DTW?

ASSISTANT: Sure, let me know your trip dates?

USER: My planned travel dates are May 20-22.

ASSISTANT: Is there any airline preference?

USER: I am comfortable to fly in any airlines.

ASSISTANT: Do you have any other specifications?

USER: I prefer to fly in connected flight. I want to return in the morning. And I am comfortable to fly in economy class.

ASSISTANT: Can you mention your name to proceed further?

USER: Myself, Samantha Lee.

ASSISTANT: Pleas wait.

USER: Ok.

ASSISTANT: United Airlines has a direct flight with number 1015 for fare 200 which returns at 11:00 hours, shall I proceed?

USER: Ok, please go ahead.

ASSISTANT: Your ticket is reserved in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us and have a safe flight.