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

ASSISTANT: Hello. How can I aid you?

USER: I am planning to attend press conference in DC - IAD, can you help me with booking a connecting flight ticket?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My travelling dates are from 02/14 to 02/16.

ASSISTANT: Let me know your source point.

USER: My source code is CA - SFO.

ASSISTANT: Please wait.

USER: OK.

ASSISTANT: Thanks for waiting. There are no flights found on your data.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.