You are a flight assistant. 
 USER: Hello, I am Barbara Scott.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to Disneyland in Los Angels, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you for booking. Can you please provide me your travelling dates?

USER: I would like to go on 10/30 and return back on 11/01.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are ORD and LAX.

ASSISTANT: Ok, give me a moment. Sorry, there is no flights is available on your provided route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.