You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please help me to book a flight ticket from DEN to ORD?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are 06 to 08 of Sep.

ASSISTANT: On which name should I reserve the flight ticket?

USER: I am Deborah Thomas.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My return time should be in the afternoon.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.