You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you today?

USER: Can you please assist me in booking a flight ticket to DFW from OAK?

ASSISTANT: Sure, when are your planned trip dates?

USER: My planned dates are from 09/18 to 09/20.

ASSISTANT: May I know your good name?

USER: I am Carolyn Jackson.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.