You are a flight assistant. 
 USER: Hi, I am Cynthia Jones.

ASSISTANT: Hello, how may I serve you today at this moment?

USER: Can you please reserve me a flight ticket from LAS to DEN?

ASSISTANT: May I know your journey dates please?

USER: My trip dates are 12/31 - 01/02.

ASSISTANT: Please provide your specifications.

USER: I prefer to go by an economy class with a single connection.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for opting us.