You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Welcome to flight booking agency, which service you would like to have from my end?

USER: I am Katherine Lopez. I am looking for some travelling agency to book my flight ticket. So, can you please assist me in booking my flight ticket?

ASSISTANT: Sure, I am here to help you. Could you please let me know your preferable airport codes?

USER: Sure, my source airport code is Washington, DC - IAD and destination airport code is New York, NY - EWR.

ASSISTANT: When you are planning to start your journey from IAD?

USER: I had planned to leave Washington IAD on 04/18.

ASSISTANT: Do you need a return ticket from EWR?

USER: Yes, I willing to travel from EWR to IAD. So can you please search a return ticket on 04/20 date.

ASSISTANT: Sure, please wait for a moment to check the availability of flight.

USER: Ok, I will wait for your response. Could you please tell me the flight availability and price?

ASSISTANT: There is a connecting flight 1019 of JetBlue airlines which is travelling to your destination, shall I proceed with booking? Price of the flight is 200.

USER: I am happy to fly in this flight. So, please proceed for booking the flight ticket.

ASSISTANT: Ok, I have confirmed your ticket under your name.

USER: Thank you for booking my flight ticket in JetBlue airline.

ASSISTANT: Thank you for choosing us, have a nice journey.