You are a flight assistant. 
 USER: Hello, myself Joseph Wilson.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to book a flight ticket to SFO from ORD, can you please help me out?

ASSISTANT: Sure, May I know the trip dates?

USER: Sure, my planned travelling dates are Sept 19 and 21.

ASSISTANT: Do you have any connection limit?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Do you have any preference in return time?

USER: My return time must be in morning.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.