You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Virginia Baker.

ASSISTANT: How can I render you today?

USER: I want to attend memorial service of my grandfather at Austin,TX-AUS. Can you please book me a direct flight?

ASSISTANT: Sure, I am glad to help you, may I know your travelling dates?

USER: My travelling dates are from 09/23 to 09/25.

ASSISTANT: May I know your source airport code?

USER: My source code is Chicago, IL-ORD.

ASSISTANT: Please wait for a while. There are no flights found on your requested dates.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for approaching us.