You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your name please?

USER: I am Alexander Jackson.

ASSISTANT: Please be on hold Jackson.

USER: Ok.

ASSISTANT: There is no reservation found under your name in our records.

USER: That's fine. Thank you.

ASSISTANT: Thank you for choosing us.