You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Laura Anderson and I want to book a flight ticket from CA-OAK and TX-DFW.

ASSISTANT: May I know your journey dates?

USER: My travelling dates are from 01/04 to 01/06.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, no flights found with your given details.

USER: No issue. Thanks for your service.

ASSISTANT: Thanks for choosing us.