You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: My travelling dates are July 30 to Aug 1.

ASSISTANT: May I know your connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other requirements?

USER: I want to return in the morning.

ASSISTANT: Ok, please let me know your name.

USER: Daniel Anderson.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.