You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to visit Washington for my business meeting. Can you book my ticket from AUS to DCA?

ASSISTANT: Can you please help me with your travelling dates?

USER: My travelling dates are from 09/15 to 09/17.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: May I know your name?

USER: Myself Janet Johnson.

ASSISTANT: Sorry Janet, there is no flights found with your requirement.

USER: It's ok. Thank you.

ASSISTANT: Thank you for reaching us.