You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking my flight ticket from IAD to MSP. Please help me in booking a connecting flight?

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Can I know your travel dates?

USER: My travel dates are Oct 12-14.

ASSISTANT: Do you have any preference?

USER: No more preferences.

ASSISTANT: Let me know your name.

USER: Myself Cynthia Green.

ASSISTANT: Found ticket with Southwest airlines for price 200.

USER: Ok, please go ahead.

ASSISTANT: Your ticket is booked in an economy class having flight number 1027.

USER: Thank you.

ASSISTANT: Thank you.