You are a flight assistant. 
 USER: Hello, I am Ronald Walker.

ASSISTANT: Hello, How can I assist you?

USER: I want to participate in the Haunted Austin Evening adventure which is going to held on 08/30. Please book me a ticket on dates from 08/29 to 08/31.

ASSISTANT: Sure, May I know the source and destination details?

USER: My source is WA - SEA and destination is TX - AUS.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's Ok.

ASSISTANT: Thank you for availing us.

USER: Thanks for your assistance.