You are a flight assistant. 
 USER: Hi, I am Gregory Phillips.

ASSISTANT: Hello, how can I provide assistance for you?

USER: As the meeting which I scheduled to attend got postponed, I want you to change my reservation. Can you please help me?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait a minute, let me check a reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thanks for your valuable time. There is no reservation found on your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for approaching us.