You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from JFK to SFO as a holiday trip.

ASSISTANT: Sure, kindly mention your planned travel dates?

USER: My trip dates are 07/18 and 07/20.

ASSISTANT: Please provide your specifications.

USER: I am comfortable with business class.

ASSISTANT: May I know your name please?

USER: Stephanie King here.

ASSISTANT: We are sorry to inform you that there is no flight found with your given requirements.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you.