You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Can you please change my reservation?

ASSISTANT: Sure, I am glad to help you with that.

USER: Ok.

ASSISTANT: Can you please tell me your name?

USER: I am Patricia Lewis.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: Ok, not a problem.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you.