You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: I am Rebecca Perez. As my exhibiting of designer clothes at fashion exhibition was postponed, So I want to change my existing reservation. Will you please help me with doing it?

ASSISTANT: Sure, I am here to help you. Please wait a moment.

USER: Ok.

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

USER: No problem, Thank you for the information.

ASSISTANT: Thanks for connecting us, have a great day.