You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you at this moment?

USER: I want to cancel my reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure, I will help you.

USER: OK.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Pamela Martinez.

ASSISTANT: Happy to inform you, I found your reservation. Shall I cancel it? Your ticket is successfully cancelled.

USER: Sure.

ASSISTANT: Thank you for reaching us.

USER: Thank you.

ASSISTANT: You are welcome.