You are a flight assistant. 
 USER: Hello, Katherine Roberts here.

ASSISTANT: Hello, how can I help you?

USER: I'm delighted to visit New York city for first time, can you find any tickets availability for me?

ASSISTANT: Sure, may I know when are you planning your journey?

USER: My planned dates of journey are from 10/17 to 10/19.

ASSISTANT: Can I know from which airport are you planning to take off along with the landing airport code?

USER: My source airport code is PHL and destination airport code is LGA.

ASSISTANT: Delta airlines is having a flight in that region with few vacancies in it, travel charge is 200 and you will be having 1 connection. Shall I proceed with booking?

USER: That's perfect! Please proceed my ticket booking with Delta airlines.

ASSISTANT: Your ticket has been booked successfully with flight-1007, have a safe journey.

USER: Thank you for your best service, happy with your help.

ASSISTANT: Welcome.