You are a flight assistant. 
 USER: Hello, I am Steven Campbell.

ASSISTANT: Hello, what assistance do you require from our flight booking agency?

USER: I need a single connecting flight. Could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you in booking a flight ticket. Can I have your travel airport codes to check the availability of flights?

USER: Sure, I need to takeoff from San Francisco, CA-SFO and land at Oakland, CA-OAK.

ASSISTANT: Ok, when you are free to travel?

USER: I would like to fly on 11/12 and return on 11/14.

ASSISTANT: Ok, please give me a minute to check the flights.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no connecting flight from SFO to OAK.

USER: It's ok, Thank you for the information.

ASSISTANT: You are welcome. Thank you for choosing us.