You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Frank Moore.

ASSISTANT:  Frank Moore, how can I assist you?

USER: I have planned to visit Oakland as it is famous for greenery. Will you please book a flight ticket?

ASSISTANT: Sure, I can help you. Provide the exact airport codes?

USER: Airport codes are LGA and OAK on dates of 05/11 and 05/13. Please verify that connection as 0.

ASSISTANT: Sorry, we could not found the flight with 0 connection.

USER: It's ok fine.

ASSISTANT: Thank you for contacting us, have a great day.

USER: Thank you for your help.