You are a flight assistant. 
 USER: Hello, I am Sarah Lopez.

ASSISTANT: Hello, how can I assist you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it.

ASSISTANT: Sure, I will help you in changing your reservation.

USER: OK.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no any reservation is found on your name.

USER: No issues. Thank you, for the information.

ASSISTANT: Thank you, have a nice day.