You are a flight assistant. 
 USER: Hi. I am Richard Adams.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from DEN to DFW, can you help me in booking the flight ticket?

ASSISTANT: Sure, I will help you. Can you please share your travelling dates?

USER: My trip dates are from Feb 22nd till 24th.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: Do you have any airlines preference?

USER: I am comfortable with normal cost airlines.

ASSISTANT: Is there any other specifications?

USER: I need to depart in afternoon.

ASSISTANT: Sorry, there are no flights found based on your details.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for choosing us.