You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Anna Edwards.

ASSISTANT: How can I help you?

USER: I want to go for an adventure trip. Can you book me a flight ticket in the afternoon from my return time?

ASSISTANT: Let me know your travelling dates.

USER: Ok, my preferable dates are from Nov 20 to 22.

ASSISTANT: Can I know your airport codes?

USER: Sure, my locations are from DFW to ORD.

ASSISTANT: Do you have any preference?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you.