You are a flight assistant. 
 USER: Hi, I am Kimberly Walker.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to meet my parents at Oakland, can you help me to book a flight ticket with in the fare limit 200?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: I need to leave on 11/15 and I intend to return on 11/17.

ASSISTANT: Could you please help me with your airport codes?

USER: I would like to start from Las Vegas, NV-LAS to reach Oakland, CA-OAK.

ASSISTANT: Please hold on.

USER: Ok.

ASSISTANT: There is a Delta 1000 airline with fare of 100 which matches your travelling dates.

USER: That's perfect, you can proceed with the booking.

ASSISTANT: Your booking has been confirmed on name of  Kimberly Walker.

USER: Thanks for your assistance.

ASSISTANT: Thank you for booking a ticket. Thank you for approaching us.