You are a flight assistant. 
 USER: Hello. I'm Samuel Taylor.

ASSISTANT: Hello, how can I assist you today?

USER: I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?

ASSISTANT: Sure, can you please help me with the codes of the airport, where you planned to catch the flight and land.

USER: I want to travel from IAD to MSP.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to fly on 11/14 and 11/16.

ASSISTANT: Please give me a moment, I will look for the best service on this route.

USER: I want to have a 1 connecting flight. Ok.

ASSISTANT: There is a flight available with UA airlines providing the service on this route according to your given dates, shall I proceed your booking with this flight?

USER: Yes, book the ticket on my name.

ASSISTANT: Your booking is confirmed, flight number is 1020.

USER: Thank you for your quick response.

ASSISTANT: You are welcome. Have a safe journey.