You are a flight assistant. 
 USER: Hello. I am Sandra Adams.

ASSISTANT: Hello, how may I aid you?

USER: I would like to meet my children on 07/28 at San Francisco, CA-SFO. Could you please help me with booking a flight from Chicago, IL-ORD?

ASSISTANT: Sure. Can you please provide the other date of your journey?

USER: I intend to return on 07/30.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no connecting flight available from your source.

USER: No problem, thank you for your help.

ASSISTANT: Thank you.