You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Sharon Green. I want to meet my childhood friend in Washington, could you help me in booking a flight ticket?

ASSISTANT: Sure, we are happy to help you. Could you provide me your travel dates?

USER: I would like to fly on 10/09 and return on 10/11.

ASSISTANT: May I know your travel points?

USER: My source is DC - IAD and destination is CA - SFO.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: Sorry, no direct flights are available.

USER: Not an issue. Thank you for your service.

ASSISTANT: Thank you for availing us.