You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I aid you?

USER: Please book a ticket from Los Angeles, CA-LAX to Chicago, IL-ORD.

ASSISTANT: Sure. Can I know your travelling dates?

USER: My travelling dates are from 01/12 to 01/14.

ASSISTANT: May I know your name?

USER: My name is Brandon Turner.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: Ok.

ASSISTANT: Thank you.

USER: Thanks.