Hello, I am Donald Walker.
Hello, how may I assist you today?
Owing to an emergency I want to change my existing reservation, can you please help me with that?
Sure, please wait for a while I will get back to you.
Sure, take your own time.
Thanks for waiting, we have not found any flight reservation on your given name.
Ok, no issues. Thanks for your information.
Thank you for choosing us,have a great day ahead.