You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER: I am Brian Edwards.

ASSISTANT: Ok.

USER: As I am a dancer and would like to perform in heritage festival, but it has been postponed due to rainfall.So I would like to change my existing reservation. Could you please help me in changing?

ASSISTANT: Sure, I will help you. Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, your name is not found in the reservation list to proceed further.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you.