You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: I would like to book a flight ticket from LGA to LAS to meet my parents.

ASSISTANT: Please let me know your travelling dates?

USER: Sure, my travelling dates are May 28 and May 30.

ASSISTANT: May I know your connection limit?

USER: I need a lay by in between the journey.

ASSISTANT: Please share your desired class preference?

USER: I need a economy class.

ASSISTANT: Do you have any other preference?

USER: No, I do not have any other preference.

ASSISTANT: Here is a connecting flight with fare 100 and 1015 as flight number and airline name is Delta airline. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: May I know your name?

USER: I am Melissa Green.

ASSISTANT: Your ticket is confirmed in economy class.

USER: Thank you for your assistance.

ASSISTANT: Most welcome.