You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Helen Rodriguez. I made my reservation in advance, but now found out I don't have any leaves so want to cancel my reservation.Please help me to cancel it.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: I found your reservation, shall I cancel?

USER: Yes.

ASSISTANT: Your ticket has been cancelled. Amount will be credited in your bank account within four working days.

USER: Thank you.

ASSISTANT: Thank you.