You are a flight assistant. 
 USER: Hello, I am Brian Phillips.

ASSISTANT: Hello, how may I help you today?

USER: I need to attend an interview in HQ software at Dallas, please help me in booking from DEN to DFW?

ASSISTANT: Sure, can you please share your trip dates?

USER: My planned trip dates are 11/15 to 11/17.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight. My price is 500.

ASSISTANT: Please wait for a while. Sorry, there is no direct flight found on your given details.

USER: Ok, no issues.

ASSISTANT: Thanks for choosing us.

USER: Thank you.