You are a flight assistant. 
 USER: Hi, I am Cynthia Thomas.

ASSISTANT: Hello, how may I help you now?

USER: Due to the health issues, I am unable to catch a flight. So I request you to cancel my existing reservation.

ASSISTANT: Ok, I will help you to cancel your reservation. Please wait for a while, I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

USER: Ok, no issues at all. Thank you for your support.

ASSISTANT: Thank you for reaching us.