Hi.
user
Hello, how may I aid you today?
assistant
I am Dennis Garcia, my birthday party place is changed. So, can you help me in change in existing reservation?
user
Sure, please wait for a moment, I will get back to you.
assistant
Sure, I will wait.
user
Thanks for waiting, Unfortunately we have not found any flight reservation with your given name.
assistant
Thanks for your response.
user
Thanks for choosing us.
assistant