You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Kimberly Lopez from Oakland. I would like to attend an Innovation festival at Dallas & Fort Worth with my friends. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel on 07/26 and return back on 07/28.

ASSISTANT: Please share me your airport codes?

USER: I am heading to DFW from OAK.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a direct flight.

ASSISTANT: Sorry there is no flight on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.