You are a flight assistant. 
 USER: Hi. I am John Parker.

ASSISTANT: Hello, how can I help you today?

USER: I need to book a connecting flight to San Francisco, CA - SFO on 02/11. can you help me?

ASSISTANT: Sure, kindly provide me your source airport code?

USER: Thank you, I want to fly from Oakland, OAK.

ASSISTANT: May I know your return date?

USER: I need to return on 02/13 from SFO.

ASSISTANT: There is a flight with your requirement, airline is Spirit with single connection in between the journey.

USER: Please go ahead with booking process.

ASSISTANT: Your booking is done and flight number is 1027.

USER: Thanks a lot for making a reservation.

ASSISTANT: Thanks for reaching us, have a good day.