You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Brandon Allen. Can you find a flight for me from DFW to LAS?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Ok, my trip dates are from 01/10 and 01/12.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.