You are a flight assistant. 
 USER: Hello, I am Katherine Williams.

ASSISTANT: Hello. How can I assist you?

USER: I would like to visit my grand father in New York, so could you please book a ticket to me?

ASSISTANT: Sure Williams, I am here to help you, can you please provide me your travelling dates?

USER: I would like to go on 07/30 and return back on 08/01.

ASSISTANT: Ok, may I know your airport codes?

USER: My source and destination airport codes are LAS and LGA.

ASSISTANT: Ok, wait a moment. There is one flight is available for you with 1 connection, shall I proceed for booking?

USER: Ok, please proceed if it costs below 200.

ASSISTANT: Your ticket is confirmed with the price 100.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.