You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today.

USER: I want to change my existing reservation due to my official work is postponed. Can you help me for this one?

ASSISTANT: Sure, I will help you. May I know your name?

USER: Sure, Virginia Lee here.

ASSISTANT: Please wait for a while.

USER: Sure.

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

USER: No issues, thank you for the information.

ASSISTANT: Thanks for availing us.