You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Gregory Martin here. I want to cancel my reservation due to my health issue.

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you for the help.

ASSISTANT: Please wait for a while.

USER: Ok, sure.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, anyway thank you for the information.

ASSISTANT: Thank you for reaching us.