Hi.
user
Hello. How may I help you out?
assistant
Owing an emergency want to change my reservation, can you help me with it please?
user
Sure, I will help you in changing in the reservation. May I know your name please?
assistant
     My name is Paul Carter.
user
Sorry, there are no reservations found.
assistant
That's ok, thank you for the response.
user
Thank you for reaching us.
assistant