You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Carolyn Adams. I want to attend a music festival at Oakland. Can you please help me to book a flight ticket in my preferable dates 05/28 and 05/30?

ASSISTANT: Do you need halt in between your journey?

USER: Yes , I need a halt.

ASSISTANT: Can I know your travelling codes?

USER: My origin and destination airport codes are IL-ORD and CA-OAK.

ASSISTANT: Found ticket with airline Spirit for price 100.

USER: Ok.

ASSISTANT: Ticket is booked having flight number 1000.

USER: Thank you for booking.

ASSISTANT: Thanks.