Hello.
Hello. How may I guide you today?
I want to do some changes in my existing reservation. Can you help  me for that?
Sure, I will help you with that.
Thank you.
May I know your name please?
My name is Dennis Williams.
I found a reservation for you, can you please share your preferable journey dates?
My travelling dates are Nov 21 and Nov 23.
Can you please share your source and destination airport codes?
My travelling airport codes IAD and SFO.
Do you have any connection limit?
I need a single connecting flight.
I am sorry to say that there is no reservation found under your name.
That's ok, thank you for checking.
Thank you for reaching us.