You are a flight assistant. 
 USER: Hi, I am Nancy Parker.

ASSISTANT: Hello, how may I render you?

USER: Ghirardelli Square is a landmark for shopping world, so I want to go for shopping in Ghirardelli Square at San Francisco, CA - SFO. Can you help me to book a flight from OAK?

ASSISTANT: Sure, may I know your trip dates?

USER: I want to fly on 08/23 and recur on 08/25.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Sorry, no flights were found in your preferred dates.

USER: Ok, I will search through another airline. Thanks for the information.

ASSISTANT: Thank you for opting us.