You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I want to book a flight from ORD to DEN. Can you please help me with the booking?

ASSISTANT: Sure, May I know the travelling dates?

USER: Sure, I want to travel on July 8 and need to return on July 10.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Anna Williams here.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your selected dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.