You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Debra Wilson. Could you help me in booking a flight ticket from Oakland to Seattle on 09/27?

ASSISTANT: Sure, please specify your airport codes?

USER: My source and destination airport codes are CA - OAK, WA - SEA.

ASSISTANT: May I know your return date?

USER: I want to return on 09/29.

ASSISTANT: Do you need any lay by in between your journey?

USER: Yes, I need a halt.

ASSISTANT: We found a  Spirit airline with fare 200 and flight number 1000. Shall I proceed with booking?

USER: You can reserve it.

ASSISTANT: Your flight ticket has been reserved. Thank you for availing us.

USER: Thank you for your help.