You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please help me out?

ASSISTANT: Sure, I am happy to help you with that.

USER: My name is Sandra Perez.

ASSISTANT: Thank you for providing your name. Please wait a  moment to check your reservation status.

USER: Sure, I will wait for you reply.

ASSISTANT: Sorry Sandra Perez, no reservation has found under your name to cancel.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.