You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from PHL to SFO.

ASSISTANT: I am here to help you. May I know your trip dates?

USER: My trip dates are from Dec, 04 to Dec, 06.

ASSISTANT: DO you have any connection limit preference?

USER: I need a single connecting flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No, I do not have.

ASSISTANT: Do you have any time concern?

USER: No, please book my ticket quickly.

ASSISTANT: Could you help me with your name please?

USER: Sharon Hall.

ASSISTANT: I found a connecting flight with American Airlines and the airfare is about 100. Shall I proceed with flight 1000?

USER: Please go ahead.

ASSISTANT: For a economy class your ticket is booked successful.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.