You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Katherine Carter, want to travel from AUS to LAS. Please help me.

ASSISTANT: Sure, on which dates you are planning to travel?

USER: My travel dates are from 01/10 to 01/12.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, on these dates there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.