You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I guide you today?

USER: I want to book a ticket from ORD to DTW, can you help me?

ASSISTANT: Sure, let me know your trip dates?

USER: My travel dates are Dec 18 and 20.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: I want to travel in economy class.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Can I know your name?

USER: I am Sandra Smith.

ASSISTANT: There is a connecting flight 1007 in Southwest airline with price is 200 and class is economy. Shall I proceed?

USER: You can book it.

ASSISTANT: Your booking has been reserved.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.