You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Lisa Carter, I want to book a flight to Denver to visit Red Rock Amphitheater with my friend. Can you help me to book a flight?

ASSISTANT: Sure, I am happy to help you. Could you please help me with your travel dates?

USER: I will fly on 09/06 and return on 09/08.

ASSISTANT: Please specify your airport codes?

USER: I will travel from NV-LAS to CO-DEN.

ASSISTANT: Do you need any other specifications?

USER: I need a connecting flight. My budget is 1000.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for being patient. Sorry to inform you that, there is a no flight found on your requested dates. May I know your name?

USER: Thanks for the information, I will replan my journey and back to you for booking. I already provided the name.

ASSISTANT: Thank you for opting us.