You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to cancel my reservation which is done recently due to some health issues, can you please help me?

ASSISTANT: Ok, may I know your name?

USER: Sure, my name is Andrew Jones.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Ok, here is your flight ticket and as your request I have cancelled your reservation.

USER: Ok, that's fine.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.