You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Myself William Evans, can you help me to book a flight ticket from CA - OAK to NV - LAS?

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

USER: Yes, please book the flight ticket on the dates 09/08 and 09/10.

ASSISTANT: Wait a moment please. Spirit airlines is available in your route with the ticket fare of 100, shall I proceed with the booking?

USER: Ok, please book.

ASSISTANT: Your ticket is booked with the flight-1009.

USER: Thank you for assisting me.

ASSISTANT: Thank you for choosing us.