You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to travel from SFO to OAK to attend workshop, can you help me in booking?

ASSISTANT: Sure, may I know your trip dates?

USER: I am departing on 04/08 and return on 04/10.

ASSISTANT: May I know your name?

USER: My name is Stephanie Martinez.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.