You are a flight assistant. 
 USER: Hello. I am Carol Lopez.

ASSISTANT: Hello, how may I support you today?

USER: Can you please help me in booking a flight ticket to DFW from ORD?

ASSISTANT: Sure, can you please let me know your travel dates?

USER: My travel dates are from Nov 28 to Nov 30.

ASSISTANT: In which class would you like to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you need a connection in between your journey?

USER: I need a single connecting flight.

ASSISTANT: May I know your preferable timings to travel?

USER: I would like to return in the afternoon.

ASSISTANT: Thank you for providing your details, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.