You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Linda Phillips.

ASSISTANT: How can I help you today?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, I am here to help you to change your reservation.

USER: Ok.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: No problem, thanks for the help.

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