You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Williams.

ASSISTANT: How can I assist you with your concern?

USER: I am planning to celebrate by birthday with my family at Austin, can you please help me to book a flight  from OAK to AUS?

ASSISTANT: Ok, please may I know the travel dates too?

USER: Sure, my travel dates are 06/18 and 06/20.

ASSISTANT: There are no flights available at your location to book.

USER: That's ok, no problem.

ASSISTANT: Thank you for choosing our agency.

USER: Thank you for your information.