You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I need to attend my grandfather memorial at San Francisco,CA-SFO. can you please help me out for booking a flight ticket?

ASSISTANT: Sure, May I know the source code?

USER: My leaving point is New York, NY-JFK.

ASSISTANT: Please help me with your travel dates.

USER: My travelling dates are from 09/16 to 09/18.

ASSISTANT: May I know your name?

USER: I am Brenda Hernandez.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issue.

ASSISTANT: Thank you for opting us.

USER: Thank you for the information.