You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Sharon Brown.

ASSISTANT: How can I help you?

USER: Due to some health issues I want to cancel my recent reservation, can you please help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: No reservation found with your given details.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for your information.