You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may i help you?

USER: My name is Ashley Allen. I would like to travel from AUS to LAS, could you help me out?

ASSISTANT: Sure, please share your travel dates.

USER: My preferable dates are from 04/27 to 04/29.

ASSISTANT: Sorry, no flights available for the given schedule.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.