You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you help me to change my reservation as my meeting got postponed?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Could you please provide your name to check your reservation status?

USER: Sure, I am Joseph Carter.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's not a problem. Thank you for checking.

ASSISTANT: Thank you for choosing us.