You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Nicole Martin here. Can you please help me in changing my existing reservation?

ASSISTANT: Ok, please wait a moment I will check.

USER: Sure.

ASSISTANT: Ok, thank you for waiting. Sorry as per your need there is no reservation been found on your name to modify.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing our agency.