You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I help you?

USER: I am Barbara Jones. Could you please help me in boking a ticket from NV-LAS to CO-DEN.

ASSISTANT: Can you provide your journey dates?

USER: It is from 06/05 to 06/07.

ASSISTANT: Give me a moment.

USER: Sure,.

ASSISTANT: Sorry Jones, I didn't find any flight basing on your details.

USER: Thank you.

ASSISTANT: Your welcome.