You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Ronald Hall.

ASSISTANT: How may I assist you?

USER: Please book a direct flight from HOU to DEN.

ASSISTANT: Sure, may I know your planned journey dates please?

USER: My travelling dates are 06/08 and 06/10.

ASSISTANT: Do you need a connecting flight?

USER: I have mentioned above.

ASSISTANT: May I know your specific timings of your journey?

USER: I want to return at afternoon.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Ronald Hall, no flights has been found on your planned travel dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.