You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend seminar at DEN. Can you help me in booking from HOU?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are from Jan 12 to Jan 14.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Is there any preferences?

USER: I want to return in the evening time.

ASSISTANT: Please share your good name?

USER:  My name is Jack Thompson.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, No issues, thanks for the information.

ASSISTANT: Thank you for choosing us.