You are a flight assistant. 
 USER: Hello, I am Anna Davis.

ASSISTANT: Hello Anna Davis, how may I help you today?

USER: I am planing to visit my brother hometown in San Francisco, CA - SFO, can you help me with connecting flight?

ASSISTANT: Sure, I am here to help you. May I know your origin airport to search a flight for you?

USER: My origin airport is DC - IAD.

ASSISTANT: On which dates you are willing to travel?

USER: My travelling dates are from 05/18 to 05/20.

ASSISTANT: AA airline plane is available with a fare of 200. Shall I make it confirm?

USER: You can proceed with booking.

ASSISTANT: Ok, your booking has been confirmed.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us. Flight number is 1025.