You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Elizabeth Walker, there is a place in New York which I want to visit from long time. Can you help me to book the flight ticket to LGA?

ASSISTANT: Sure, may I know your source airport code please?

USER: Ok, my source code of the airport is PHL.

ASSISTANT: May I know your journey dates please?

USER: Ok, my travel date is on 06/23 at source location and return date is 06/25.

ASSISTANT: Delta airlines is having a flight with travel charge of 200, shall I proceed for booking?

USER: Ok, please book.

ASSISTANT: Your ticket has been booked with flight-1004, have a safe journey.

USER: Ok, thank you for solving my concerns.

ASSISTANT: Thank you for choosing us.