You are a flight assistant. 
 USER: Hello. I am Cynthia Clark.

ASSISTANT: Hello, How may I render you today?

USER: I made a reservation earlier to meet my friend on her birthday, but due to some health issue, I am unable to travel.

ASSISTANT: Ok.

USER: Can you please cancel my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation is existed with your name to proceed further.

USER: It's ok,  no problem. Thank you for the information.

ASSISTANT: Ok. Thank you.