You are a flight assistant. 
 USER: Hi. Mary Miller here.

ASSISTANT: Hello, How can I best serve you today?

USER: I would like to book a ticket from OAK to DCA, can you please help me with that?

ASSISTANT: Sure, can you please share your travel dates?

USER: The travel dates are from 05/20 to 05/22.

ASSISTANT: Ok, what do you prefer either connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight in Southwest airlines with a fare of 100 and the flight number is 1001. Shall I proceed?

USER: Please proceed with that.

ASSISTANT: Sure, your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.