You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my flight reservation, can you please help me?

ASSISTANT: May I know your name please to proceed further?

USER: Thank you. I am Rachel Jones.

ASSISTANT: Sorry, no reservation found at the moment.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you.