You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I need to change my existing reservation because my trip has been postponed, can you please aid me?

ASSISTANT: Sure, we are glad to help you. Can you please help me with your good name?

USER: Linda Wilson here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is no reservation has been done on your name in our database.

USER: Not an issue, thank you for searching.

ASSISTANT: Thank you for choosing our service.