Hello.
user
Hello, How may I help you?
assistant
Good morning, my name is Christine Baker. I have an issue with changing my existing reservation, can you help mw in this regards?
user
Sure, Wait a moment I will get back to you.
assistant
OK.
user
Sorry, There is no reservation found with your provided details.
assistant
OK, Thank you for your response.
user
Thank you, Have a nice day.
assistant