You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to travel DTW from PHL, can you please help me to book flight ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I planned my dates to travel on Mar 2nd and Mar 4th.

ASSISTANT: Do you have any specifications about class?

USER: I am comfortable with any class.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a direct flight.

ASSISTANT: Please mention your name.

USER: Sure, myself George Lee.

ASSISTANT: There are no flights found under your preferable details.

USER: Ok, not a problem. Thank you for checking.

ASSISTANT: Welcome, have a great day.