You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Linda Davis.

ASSISTANT: How may I assist you?

USER: The event which I am planning to attend has been postponed. Can you please chance my existing reservation to some other dates?

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: Linda, no reservation has been found on your name in our database.

USER: Its ok, no issues. Thank you for the information.

ASSISTANT: Thank you for choosing us.