Hello.
user
Hello, how can I assist you for the day?
assistant
My name is Edward Nelson. I want to do some changes in my existing reservation, can you help me for that?
user
Sure, we are here to hep you with this changing  reservation. Ok, wait for a moment.
assistant
Thank you.
user
Thank you for waiting.
assistant
Sure, I will wait for your response.
user
I have found your previous reservation with your name. Can  you please mention your new preferable airport codes for changing your reservation?
assistant
My new travelling airport codes are BOS to DTW.
user
May I know your new travelling dates?
assistant
My travelling dates are Jan 19 and Jan 21.
user
Do you have any other specifications?
assistant
I need a single connecting flight.
user
There are no flights available as per your requirements.
assistant
That's ok, thank you for checking.
user
You are welcome, thank you for choosing our agency.
assistant
Welcome.
user