You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my recent reservation, as my health is not good to travel. Can you please help me with this?

ASSISTANT: Sure, can you please tell your name to check your reservation details?

USER: Yes, I am Sandra Williams.

ASSISTANT: Sorry, there is no reservation found by your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you and have a nice day.