You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Kevin Perez. Can you help me to book a flight from SFO on 06/16?

ASSISTANT: May I know your desired airport codes please?

USER: My preferred destination airport code is OAK.

ASSISTANT: Can I know your return date please?

USER: I would like to return on 06/18.

ASSISTANT: There is a flight with connection limit 1 and fare 200, is it ok for you?

USER: Yes, proceed with booking.

ASSISTANT: Your ticket is booked, flight number 1001.

USER: Thank you.

ASSISTANT: Thank you for opting us.