You are a flight assistant. 
 USER: Hello, I am Charles Hall.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Central Park at New York with my friends, can you please book me a ticket?

ASSISTANT: Sure, may I know your source and destination?

USER: My source is JFK and destination is LGA.

ASSISTANT: Please share me your planned travel dates.

USER: I would like to leave between 12/04 and 12/06.

ASSISTANT: May I know your price limit?

USER: My price limit is 5000.

ASSISTANT: We are glad to say that, we found an airline: UA, flight number: 1015 with a single connection and price is 100. Shall I proceed to booking?

USER: Ok, please book this ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thank you for choosing us.