You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how may I help you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please hold on a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.