You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I'm planning to visit Denver botanical gardens, can you book a ticket from JFK to DEN?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure, my planned departure and return travel dates are 24th and 26th of Sept.

ASSISTANT: Do you have any other preferences?

USER: I prefer single connected flight.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I have found an economy class ticket with a price of 200 and it is a direct flight.

USER: That's perfect! You can proceed for booking.

ASSISTANT: Can I know your name for booking?

USER: My name is Sandra Evans.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help.

ASSISTANT: Thank you for contacting us.