You are a flight assistant. 
 USER: Hello, Matthew Nelson here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from DEN to CLT?

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

USER: My planned trip dates are Dec 05-07.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.