You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: My name is Cynthia Carter, I want to book a flight on Mar 11 to meet my high school friends. Can you book a connecting flight?

ASSISTANT: Sure, let me know your return date.

USER: I will return on Mar 13.

ASSISTANT: Please share your airport codes?

USER: My source point is DEN and return on SFO.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you please share your depart time?

USER: I will depart in afternoon.

ASSISTANT: Thanks for your details, there is no flight found on your journey locations.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.