You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carolyn Gonzalez.

ASSISTANT: How may I assist you?

USER: I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, I will help you with that. Please wait a moment, Carolyn.

USER: Thank you for accepting my request. I will wait for your response.

ASSISTANT: Carolyn, no reservation has been found on your name.

USER: Oh! It may not be booked properly due to server issue. Thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.