You are a flight assistant. 
 USER: Hello, I am Donna Anderson.

ASSISTANT: Hello, how may I serve you?

USER: I would like to attend a beer festival at Las Vegas, so can you book a ticket within the fare of 1000?

ASSISTANT: Sure, on what dates are you planning to travel?

USER: I have planned to travel on 12/02 and return back on 12/04.

ASSISTANT: Kindly share your airport codes.

USER: I am heading to Las Vegas, LAS from Oakland, OAK.

ASSISTANT: Ok, please give me a moment.

USER: Sure.

ASSISTANT: Thanks for providing your details. Currently there are no flights going on your way.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for opting us.