You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Could you please help me in booking a flight ticket from PHL to DFW?

ASSISTANT: Sure, can you share your trip dates?

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

ASSISTANT: Do you have any preferences?

USER: Yes, I am looking for a flight with one connection.

ASSISTANT: May I know your name?

USER: My name is Kathleen Taylor.

ASSISTANT: There is a connecting flight with number 1001 in airline Southwest, the fare is 100 in economy class. Can I book it?

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.