You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I would like to meet my sister at Minneapolis, please book a ticket from DCA to MSP.

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My planned travel dates are on Mar 10 and Mar 12.

ASSISTANT: Do you have any preferences?

USER: No more preferences, please find the availability of flights.

ASSISTANT: I have found an economy class ticket with a price of 100 and 1 connection.

USER: Ok, please proceed for booking.

ASSISTANT: Can I know your name for booking?

USER: My name is Virginia Green.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.