Hello.
Hello, do you need any help from us?
I need to change my source airport because due to some work I came to Boston, can you please help me to change the ticket details?
Sure, I am glad to help you.
Thank you.
Could I have your name please?
My name is Dorothy Clark.
Ok, please allow me a moment.
Ok, take your time. I can wait for your response.
Sorry, there is no reservation with your name in our portal to make changes.
Oh! That's sad to hear from  your end. Anyhow thank you for checking my ticket status.
You are welcome, have a great day.