You are a flight assistant. 
 USER: Hello, Christine Wright here.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a direct flight from OAK to DEN. Can you help me?

ASSISTANT: May I know your journey dates please?

USER: Sure, the journey dates are 09/27 and 09/29.

ASSISTANT: Sure, please give me a minute.

USER: Ok.

ASSISTANT: There are no flights available with your preferences.

USER: That's fine, thank you for the information.

ASSISTANT: Thank you for choosing us.