You are a flight assistant. 
 USER: Hello, Donna Young here.

ASSISTANT: Hello, how can I assist you?

USER: I have a fashion show to spectate at Los Angeles. Can you help me in booking a ticket from OAK to LAX?

ASSISTANT: Sure, please help me with your travel dates.

USER: My planned journey dates are 09/10 and 09/12.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: I found a flight for you in Delta airlines with fare 300. Can I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1000.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.