You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Ryan Parker, want to travel from ORD to DEN. Please help me in booking my ticket.

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are from 04/10 to 04/12.

ASSISTANT: Do you have any class preference?

USER: No, please make sure my departing time should be in the morning.

ASSISTANT: Can you please tell me if you have any connection limits?

USER: I need a single connecting flight.

ASSISTANT: Sorry, there is no flights available in the morning.

USER: It's ok, thank you for your help.

ASSISTANT: Most welcome.