You are a flight assistant. 
 USER: Hello, I am Laura Evans.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in booking a flight from DFW to DEN?

ASSISTANT: Sure, I will help you. Can you please provide your planned journey dates?

USER: I am planning to start on Aug 9th and return back on Aug 11th.

ASSISTANT: Do you have any specifications?

USER: Search for the tickets in economy class and departure time should be in evening.

ASSISTANT: Do you need a break in between your journey?

USER: I prefer to travel in normal cost airline and it should be direct flight.

ASSISTANT: Laura Evans, no flights has been found on your specifications.

USER: No issues. Thank you for checking.