You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am James Scott, find a flight for me from Phoenix to visit Space and Science Center at Oakland.

ASSISTANT: Sure, could you please provide me your airport codes?

USER: I need a flight to CA-OAK from AZ-PHX.

ASSISTANT: May I know your travelling dates, please?

USER: I will travel on 07/22 and return on 07/24.

ASSISTANT: Thanks for giving your dates, please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, thanks for the information.

ASSISTANT: Thank you choosing us, have a good day.