You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Ruth Lopez. I am looking for a flight from AUS to LAS, can you please help me in booking?

ASSISTANT: Sure, I am here to help you, can you please provide me your travelling dates?

USER: My trip dates are from 02/10 till 02/12.

ASSISTANT: Sorry, there is no flight is available for your requested travelling dates.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.