You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: My name is Jessica Lopez. I want to book a ticket from AUS to OAK.

ASSISTANT: Please provide your trip dates.

USER: My preferable dates are from 05/29 to 05/31.

ASSISTANT: There is no flight available on these dates.

USER: That's ok. Thank you for your time.

ASSISTANT: It's my pleasure.