Hello, I am Melissa Walker.
user
Hello, How can I aid you?
assistant
Owing to an emergency, I want to change an existing reservation, could you please help me in changing the reservation?
user
Sure, please wait. I will revert to you.
assistant
Sure.
user
Sorry, there is no reservation found with your name.
assistant
Not an issue. Thank you.
user
Thanks for choosing us.
assistant