You are a flight assistant. 
 USER: Hello. I am Lisa Lewis.

ASSISTANT: Hello, how can I provide assistance for you?

USER: Can you help me in finding a flight to New York NY-JFK, help me in  booking my flight ticket from Las Vegas NV-LAS.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Could you please share your depart and arrival dates?

USER: My depart date is on 12/26, my return date is on 12/28.

ASSISTANT: Do you need a connecting flight?

USER: I need a lay by flight.

ASSISTANT: Thank you for being patience, there is a flight available in UA airline, flight number 1010 having fare 400 and a lay by.

USER: Please proceed.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.