Hi.
user
Hello.
assistant
I am Dennis Mitchell.
user
How may I assist you?
assistant
Can you help me for changing my existing reservation?
user
Sure Dennis, please give me a minute.
assistant
Sure, I will wait for your reply.
user
Dennis, I could not find any reservation with your details.
assistant
Oh! It's ok, no problem. Thank you for your services.
user
Thank you for reaching us.
assistant