You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: Thank you. Myself Catherine Carter.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: No issue, I will choose an other alternative.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Thank you for the information.