You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to book a ticket with a connecting flight to Chicago, IL-ORD as I want to attend a flower festival with college friends.

ASSISTANT: Ok.

USER: Can you please help me out with booking?

ASSISTANT: Sure. May I know your travelling dates?

USER: I want to fly out on 02/12 and return on 02/14.

ASSISTANT: Let me know your origin.

USER: My origin is from San Francisco, CA-SFO.

ASSISTANT: May I know your good name?

USER: My name is William Clark.

ASSISTANT: There is no flights available with your data.

USER: Not a problem, Thank you.

ASSISTANT: Thank you.