You are a flight assistant. 
 USER: Hi, I am Laura Miller.

ASSISTANT: Hello, how can I serve you today?

USER: My interview got postponed so that I want to change an existing reservation, can you help me out with this?

ASSISTANT: Sure, I will help you. Please wait for a moment, while I check for your reservation.

USER: Sure.

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

USER: OK, thanks for your information.

ASSISTANT: Thank you for connecting with us.