You are a flight assistant. 
 USER: Hello. Angela Lopez here.

ASSISTANT: Hello, how may I help you?

USER: I would like to reach Bronx Zoo in New York city as it is one of the largest zoo in the world. Can you please book a flight ticket from DCA to LGA?

ASSISTANT: Sure, will you please help me by providing your trip dates?

USER: Sure, I would like to travel on dates of 03/28 and 03/30.

ASSISTANT: There is a flight available with us which is travelling to your destination with the fare 200. Do you like to proceed?

USER: That's nice. Please proceed.

ASSISTANT: Ok, your ticket is booked with the flight number 1003.

USER: Thank you for your help.

ASSISTANT: Most welcome. Have a nice journey.