You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Samantha Moore.

ASSISTANT: How may I assist you today?

USER: I want to change my existing reservation, due to sudden postpone of my fashion show competition. Can you help me in my changing reservation?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: Sorry, we do not found any reservation with your name.

USER: Not an issue. Thank you for your quick response.

ASSISTANT: Thanks for approaching us.