You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I need you to book a flight ticket.

ASSISTANT: Sure, can you provide your journey dates?

USER: October 31 and November 02 are my planned travel dates.

ASSISTANT: May I know your journey airport codes?

USER: OAK and PHX are the respective airport codes.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight to fly.

ASSISTANT: May I know your name?

USER: My name is Nicole Johnson.

ASSISTANT: Sorry, there is no direct flight on your given dates.

USER: That's ok. Thank you.

ASSISTANT: Thank you for opting us.