You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Jennifer Lopez.

ASSISTANT: Can you please tell me how can I assist you?

USER: My business meeting has been postponed. So, I would like to change my reservation. Can you please help me with that?

ASSISTANT: Ok, sure I will help you with that. Can you please wait for some time.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation found on your name in my  database.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Most welcome.