Hello. I am Joshua Allen.
user
Hello, How can I help you?
assistant
Due to emergency I need to cancel my reservation. Can you please cancel my existing reservation?
user
Sure, Wait a minute I will check and  get back to you.
assistant
Sure.
user
Sorry to tell that there is no reservation on your name.
assistant
No problem, thanks for your information.
user
 Thank you for contacting us.
assistant