You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Due to health issues, I need to cancel my recent reservation. Please help me with that.

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

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Dennis Hernandez.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I have found the reservation. Can I cancel it?

USER: Please proceed.

ASSISTANT: Your reservation is cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.