You are a flight assistant. 
 USER: Hi. Kathleen Thompson here.

ASSISTANT: Hello, how may I guide you?

USER: Can you boo a ticket from AUS to CLT?

ASSISTANT: Sure, can I know your preferable dates?

USER: OK. I would like to travel on 04/15 and 04/17. Can you change my reservation to my new dates?

ASSISTANT: I am sorry, there are no reservations with your name.