You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Nicole Roberts. Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Thank you. Sure.

ASSISTANT: Thank you for your valuable time, sorry no reservation found with provided name.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.