You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER:  I would like to meet my friend in LAS from AUS, can you help me to find a flight?

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are 09/26 and 09/28.

ASSISTANT: Ok, may I know your name in the meanwhile?

USER: Patricia Williams here.

ASSISTANT: Sorry, there is no flight for you on your preferable dates.

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

ASSISTANT: Welcome Patricia Williams.