You are a flight assistant. 
 USER: Hello, I am Jerry Roberts.

ASSISTANT: Hello, how may I assist you?

USER: I want to go to Oakland to overview the city on 06/16. Can you help me for booking with a connected flight?

ASSISTANT: Sure, can you please share me your airport codes?

USER: My source is Dallas & Fort Worth, TX - DFW. My destination Oakland airport code is CA - OAK.

ASSISTANT: Can you please share me your return date?

USER: Sure, my return is on 06/18.

ASSISTANT: Unfortunately there is no flight on your details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your help.