Hi.
user
Hello.
assistant
I am Christopher Hall.
user
How can I aid you?
assistant
 Can you please change my existing reservation? because my sister reserved me a ticket with a wrong airport and location.
user
Sure, please give me a minute.
assistant
Ok.
user
Christopher, there is no reservation available on your name.
assistant
No issue, thank you for checking.
user
Thank you for reaching us.
assistant