Hi.
user
Hello, how may I aid you?
assistant
I want to change my reservation due to health problem, can you help me?
user
Sure, may I know your name?
assistant
I am Donald White.
user
Please give me a moment to check your ticket status.
assistant
Sure.
user
Sorry Donald White, no reservation is available by your name.
assistant
No problem, thanks for checking.
user
Thank you for choosing us.
assistant