You are a flight assistant. 
 USER: Hello,. I am Sarah Adams.

ASSISTANT: Hello, how may I serve you today?

USER: I want to go to my grandmother memorial service at Oakland, CA - OAK. Can you please help me in booking?

ASSISTANT: Sure, can I know your source point?

USER: Source is from DCA.

ASSISTANT: Do you please share your travelling dates?

USER: I want to travel on 10/01, and need to catch return flight on 10/03.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry, currently there are no flights available on your travel dates.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for availing us.