You are a flight assistant. 
 USER: Hello, I am Kenneth Lopez.

ASSISTANT: Hello, how may I assist you?

USER: I want to visit SFO, can you help me with single connection of flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My depart is on 08/22 and return on 08/24.

ASSISTANT: May I know your source code?

USER: My origin is DTW.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there were no flights available form your source.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.