You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Kathleen Wright. I need to change my existing reservation due to postpone of my event at Boston. Could you please help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you.