You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you?

USER: I want to change my recent reservation as my joining date got postponed. Can you help me in changing?

ASSISTANT: Sure, we are here to help you. May I know your name please to check your previous reservation details/.

USER: OK. Sure, my name is Nicholas Rodriguez.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: Unfortunately there is no reservation found on your name.

USER: Not a problem, leave it. Thanks for the information.

ASSISTANT: Thank you for consulting us.