You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Christoper Taylor. Can you please help in booking my flight ticket from AUS to EWR?

ASSISTANT: Sure, could you please share me with your dates of journey?

USER: My travelling dates are 02/18 and 02/20.

ASSISTANT: Sorry Taylor, there is no flight found as per your travelling details.

USER: Ok, fine thank you for checking.

ASSISTANT: You are welcome.