You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Nicole Wright. I want to change my existing reservation due to postpone of my live concert. Could you please help me?

ASSISTANT: Sure, I am here to help you with that. Can you please allow me sometime to check your ticket status?

USER: Sure.

ASSISTANT: Sorry to inform you that, I have not found any reservation with your name in our database.

USER: No worries, thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.