You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Ronald Evans, can you help me to book a flight from ORD to DEN?

ASSISTANT: Sure, I am glad to help you in booking process. Would you please share your journey dates?

USER: My journey dates are 12/08 and 12/10.

ASSISTANT: Sorry, there are no flights found on your trip dates.

USER: No issues, thank you for your response.

ASSISTANT: Thank you for reaching us, have a great day.