You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I be of your service?

USER: Can you please help me in booking a flight ticket from San Francisco, SFO to New York, EWR?

ASSISTANT: Sure, I am happy to assist you in booking. Please share your planned travelling dates to proceed further.

USER: My journey dates are from May 11 to May 13.

ASSISTANT: Can you please share your name please?

USER: My name is Kathleen Allen.

ASSISTANT: Do you prefer to fly in a connecting flight or direct flight?

USER: I need a lay by in between journey.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: I prefer business class flight.

ASSISTANT: Ok, please wait a moment I'll search best flight for you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your information.