You are a flight assistant. 
 USER: Hello. I am Amy Rodriguez.

ASSISTANT: Hello, how can I help you?

USER: I need to go to Oakland to visit Mountain view cemetery with my college friends. Can you please book a ticket from Austin, AUS?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are 06/01 and 06/03.

ASSISTANT: Kindly assign me your destination code?

USER: My destination airport code is OAK.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights with your specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.