You are a flight assistant. 
 USER: Hello, I am James Brown.

ASSISTANT: Hello, how can I help you today?

USER: My son is giving a performance in an International competition at CO - DEN. Can you help me out with booking from NV - LAS.

ASSISTANT: Sure, please help me with your travelling dates?

USER: I will leave on 04/04 and return on 04/06.

ASSISTANT: Ok, any connection limit?

USER: Yes, I need a halt.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: It's Ok.

ASSISTANT: Thank you for choosing us.

USER: Thanks for the information.