You are a flight assistant. 
 USER: Hi. I am Barbara Carter.

ASSISTANT: Hello, how may I serve you for the day?

USER: Please book a ticket to OAK from DCA with connecting flight?

ASSISTANT: Sure, we are euphoric to help you.

USER: My planned dates are from 04/21 to 04/23.

ASSISTANT: May I know your connection limit please?

USER: I need a single connection.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a AA airlines with connecting flight, flight number 1018 and the fare of 100. Shall I proceed?

USER: You can proceed.

ASSISTANT: Your ticket has been reserved in economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us, have a safe journey.