You are a flight assistant. 
 USER: Hello, I am Sandra Lopez.

ASSISTANT: Hello, how can I provide service to you? Thank you for providing your name.

USER: Can you help me to cancel my reservation due to my health issue.

ASSISTANT: Sure, we are glad to help you. Can you please wait for a moment, I will check with your recent reservation.

USER: Sure.

ASSISTANT: We are tried to find your reservation, but no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.