You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Ryan Jackson here. Can you book me a ticket from SFO to OAK?

ASSISTANT: How can I help you at this moment? Sure, can you please provide your journey dates?

USER: Ok, here are my travelling dates 02/12 and 02/14.

ASSISTANT: Give me a moment please.

USER: Sure.

ASSISTANT: Delta airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: Please book the ticket.

ASSISTANT: Ryan Jackson, your ticket is booked with flight number 1002.

USER: Thank you for the help.

ASSISTANT: Thank you, have a safe journey.