You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Hernandez.

ASSISTANT: Yes Hernandez, how may I assist you?

USER: There is sudden change in my travel plan, so  I want to cancel my reservation.

ASSISTANT: Please wait a moment. Sorry, there is no reservation found with this name.

USER: That's ok, thanks for helping me out.

ASSISTANT: Thank you for reaching us.