You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Gary Garcia.

ASSISTANT: How can I aid you?

USER: I am planning to have a round trip from OAK, can you book a flight ticket?

ASSISTANT: May I know your travelling dates?

USER: Sure, my travelling dates will be 12/11 and 12/13.

ASSISTANT: Here is a flight ticket with UA airline and 1005 as flight number.

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice journey.