You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a ticket from AUS to LAS, can you help me?

ASSISTANT: Sure, when you are willing to travel?

USER: My travel dates are 05/28 and 05/30.

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

USER: Myself Michael Perez.

ASSISTANT: Thanks for your details. There is no flight available on your route.

USER: No problem, thanks for checking.

ASSISTANT: Thanks for approaching us.