You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Emma Martin here, willing to change my reservation because I have done my reservation with wrong destination. Please, help me to change my recent reservation.

ASSISTANT: Sure, I will help you with that. May I know your good name please?

USER: Thank you for positive response. I am Emma Martin.

ASSISTANT: Sorry, there is no reservation found on your name in our data base to change.

USER: Oh! ok. Thank you for the information.

ASSISTANT: Most welcome.