You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to change my reservation as my plan to go for trekking got postponed. Can you help me?

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

USER: I am Amanda Hernandez.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Hernandez, there is no reservation found as per your name in our database.

USER: Ok fine, thanks for your assistance.

ASSISTANT: Thank you for reaching us with a query.