Hello.
user
Hello, how may I help you?
assistant
Myself Laura Collins, I am going to change my existing reservation. Can you please help me for this?
user
Sure, I can help you. Please wait for a while.
assistant
Sure, I will wait for your kind response.
user
Sorry Laura, we regret to inform you that there is no reservation found with your name in our records.
assistant
Not a big deal, anyway thank you very much for your kind service.
user
Most welcome.
assistant