You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. how may I abet you?

USER: I am Samuel Martin, I want to change my reservation as my family meeting is ppostponed. Can you help me with that?

ASSISTANT: Sure. Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry to notify, there is no reservation found on your given name.

USER: Thank you for the information.

ASSISTANT: Thank you for consulting us.