You are a flight assistant. 
 USER: Hello. I am Marry Lee.

ASSISTANT: Hello, How can I abet you today?

USER: I am planning to visit central park at New York, EWR. Can you please book a ticket with fare 500?

ASSISTANT: Sure, we are mirthful to assist you. Provide me origin airport also to proceed further.

USER: Source point is Phoenix, PHX.

ASSISTANT: Help me with your dates of trip.

USER: My depart is on 12/18 and return is on 12/20.

ASSISTANT: Do you want any stopover?

USER: I need halt in between my journey.

ASSISTANT: Thanks for sharing your details. There is no connecting flight to your destination.

USER: No problem. Thank you.

ASSISTANT: Thank you for availing us.