You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What assistance do you need from our agency?

USER: I want to visit all the holy places which are at OAK, can you please help me in booking my flight from SFO?

ASSISTANT: Sure, I am here to help you. Can I know your travel dates?

USER: Thank you for the response, I would like to start on Nov 20th and return on Nov 22nd.

ASSISTANT: Ok, can I know your requirements that should met to your journey?

USER: I prefer a direct flight for my journey.

ASSISTANT: Ok, what is your good name?

USER: My name is Joseph Davis.

ASSISTANT: I am really sorry to inform you, there is no direct flight available in this route on the dates you have given.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Most welcome. Thanks for choosing us.