You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I have to change my ticket reservation due some issues in my destination, can you help me out?

ASSISTANT: Sure, may I know your good name please?

USER: Myself Edward Lopez.

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

USER: Ok, no problem with that one, thank you for your help.

ASSISTANT: Thank you for contacting us.