Hello.
user
Hello, how may I aid you today?
assistant
Due to some health issues I could not catch my flight at right time, so I need some help to change my existing reservation. Will you help me in changing?
user
Sure, we are here to help you to change it. Please wait for a while.
assistant
I made a reservation earlier on the name of Mary Martin.
user
Thanks for your time, there was no reservation found on your specified name.
assistant
No problem, thanks for your effort.
user
Thank you for availing us.
assistant