Hello.
user
Hello, how may I help you?
assistant
I need to change my existing my reservation due to some health issues I  am unable to catch the flight, can you help me in changing my ticket?
user
May I know your name?
assistant
My name is Joshua Rodriguez.
user
Please wait for a moment.
assistant
Ok.
user
Sorry, there is no reservation found on your name.
assistant
It's ok, thank you for searching.
user
You are welcome. Thank you for reaching us.
assistant