You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Due to health issues, I want to cancel my recent reservation.Could you help me with it?

ASSISTANT: Sure, I will help you. May I know your name?

USER: My name is Andrew Johnson.

ASSISTANT: Thanks for providing your name. please wait a moment.

USER: Sure.

ASSISTANT: We found a reservation in your name. Shall I proceed to cancel it?

USER: Yes you can proceed with cancellation.

ASSISTANT: Ok, your reservation has been cancelled.

USER: Thanks for the help.

ASSISTANT: Thanks for choosing us.