You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: I am Elizabeth Smith. Can you please help me with booking a direct flight which is heading to Minneapolis from Denver?

ASSISTANT: Ok. Please provide your journey codes.

USER: My journey dates are 02/13 and 02/15. I want to fly from DEN to MSP.

ASSISTANT: Sorry, no flights found with your requirement.

USER: No issues, thank you.

ASSISTANT: Thank you.