You are a flight assistant. 
 USER: Hello, I am Dorothy Wright.

ASSISTANT: Hello. How can I aid you?

USER: I want book a flight ticket to meet my husband in Oakland, CA - OAK on 07/13. Can you aid me for booking from San Francisco, CA - SFO?

ASSISTANT: Sure. May I know your return date?

USER: Sure, my return date is on 07/15.

ASSISTANT: Do you have any preferences?

USER: Make sure that the price limit is 200.

ASSISTANT: We found a flight 1021 in Spirit airline and price is 100 with a connection. Shall I proceed?

USER: Ok, you can proceed for booking.

ASSISTANT: Ok, Your ticket has been done.

USER: Thanks for your kind response.

ASSISTANT: Thanks for opting us.