You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Anna Scott.

ASSISTANT: Scott, how can I aid you today?

USER: Can you please help me in booking my flight ticket from IAH to LAS?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My travelling dates are Jan 12 and Jan 14.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you. Sorry Anna Scott, there are no flights available on your requested dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.