You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Donna Perez. I have a round trip from CA-OAK to CA-OAK.

ASSISTANT: Can you please tell your travelling dates for flight ticket reservation?

USER: My departure date is 05/19 and return date is 05/21. Make sure my price limit is 200 and the connections limit is 1.

ASSISTANT: There is a flight ticket available as per your requirements. Shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Ok. Your flight ticket is booked. The airline is Southwest and flight number is 1023.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.