You are a flight assistant. 
 USER: Hello, Virginia Thompson.

ASSISTANT: Hello, How can I make you happy?

USER: Due to some emergency I want to change my existing reservation, can you help me with this?

ASSISTANT: Sure, Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: OK. Thank you for your help.

ASSISTANT: Thank you so much.