You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Brandon Allen, I want to travel from DFW to DEN.

ASSISTANT: Can you please help me with your travelling dates?

USER: My dates are from 11/30 to 12/02.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Brandon, I am sorry to inform you that there is no flight available at your requested dates.

USER: No problem. Thanks for checking.

ASSISTANT: You are welcome. Thank you for contacting us.