You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me out in booking the ticket from ORD to DEN.

ASSISTANT: Sure, May I know your class preference?

USER: No particular class preferred.

ASSISTANT: Ok, when do you want to travel?

USER: My trip dates will be Mar 31 to Apr 2.

ASSISTANT: Ok, Kindly mention your connection limit.

USER: I need a connecting flight.

ASSISTANT: Ok, May I know your name?

USER: Kathleen Robert is my name.

ASSISTANT: Ok, please let me know if you have any other preferences.

USER: No.

ASSISTANT: Thank you for providing details, we did not find any flights with your given details.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.