Hello.
user
Hello, how may I assist you?
assistant
I need to change my existing reservation, as my planned trip got  with my friend got post-phoned.  Can you please help me out?
user
Sure, may I know your good name please?
assistant
Thank you for considering my request. My name is Michael Williams.
user
Please wait for a moment.
assistant
Sure, I will wait for your response.
user
Sorry, there is no reservation found on your name in our database to change.
assistant
Not an issue, anyway thank you for the information.
user
Thank you for approaching us.
assistant
Thank you for your service.
user