You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Margaret Thompson, I want to cancel my reservation due to my health issue. Can you help me about it?

ASSISTANT: Can I know the name on which the reservation has been done earlier? Please give me a minute.

USER: Ok, sure.

ASSISTANT: Sorry, there is no reservation available on your name.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: You are welcome.