You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I want to attend my nephew birthday celebrations at San Francisco, CA-SFO, can you please book me a ticket from New York, NY-JFK?

ASSISTANT: Sure, could you please help me your departure and arrival dates?

USER: My travelling dates are from 09/15 to 09/17.

ASSISTANT: Can I know your good name please?

USER: I am Shirley Lopez.

ASSISTANT: There were no flights found on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.