You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I have your name please?

USER: I am Helen Jackson.

ASSISTANT: How may I aid you?

USER: Please help me in booking a flight ticket to Chicago, IL-ORD for attending my sister's marriage.

ASSISTANT: Ok. To proceed in booking, may I have your source point?

USER: Sure, I will start from San Francisco, CA-SFO.

ASSISTANT: Let me know, if you have any specifications?

USER: Please book my ticket on 11/06 and 11/08. I want a single connected flight.

ASSISTANT: Ok. Unfortunately, we have no flights that matches with your information.

USER: Ok, no problem. Thank you.

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