You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name?

USER: I am Raymond King.

ASSISTANT: Ok, King can you please tell me how may I help you?

USER: I wanted to change my reservation due to my planned programme got postponed.

ASSISTANT: Ok, sure.

USER: Ok.

ASSISTANT: Sorry to say, there is no reservation found on your name.

USER: Then it's fine.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your ongoing valuable information.