You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for the day?

USER: Elizabeth Campbell here. I'm planning to visit my uncle's home, can you book a ticket from SFO to ORD?

ASSISTANT: Sure, I will help you with that. Can you please share your planned travel dates?

USER: Sure, my planned departure and return travel dates are 15th and 17th of December.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to return in the evening time.

ASSISTANT: May I know your connection limit?

USER: Yes, it is 1.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have.

ASSISTANT: There are no flights found on this route as per your details.

USER: That's ok, thank you for giving the information anyways.

ASSISTANT: Thank you for reaching us.