You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Frank Hall from San Francisco. I am planning to attend for a Music festival in Oakland, so please book a flight ticket within a price limit of 500.

ASSISTANT: Sure, may I know your travelling dates?

USER: I will start on 08/07, return on 08/09.

ASSISTANT: Can You please provide your journey codes?

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

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: There is a flight found with number 1000 and the ticket price is 100. Shall I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket is reserved in Southwest airline.

USER: Thank you for booking a flight ticket.

ASSISTANT: Thank you.