Hello.
user
Hello. How can I help you?
assistant
Due to sudden change in my trip to another location, I would like to do some changes in existing my reservation. Can you please help me out?
user
Sure, can you please mention your name to check your reservation details in our database.
assistant
Myself Melissa Hall.
user
Thank you. Please wait for a while, let me check your reservation status.
assistant
Ok.
user
 I am very sorry to inform you that there is no reservation found under your name in our database.
assistant
Thank you so much.
user
Thank you for reaching us.
assistant