You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to head from DEN to give a seminar at Oakland on 07/08. Can you help me with it?

ASSISTANT: Sure, I am here to help you? May I Know your name?

USER: Christopher Robinson is my name.

ASSISTANT: May I know your return date?

USER: I need to return on 07/10.

ASSISTANT: May I know your destination code?

USER: OAK is my destination.

ASSISTANT: Do you have any other requirements?

USER: I need a direct flight.

ASSISTANT: Sorry to tell that there is a connecting flight which matches your requirements.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for approaching us.