You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my reservation as plan to visit Las Vegas is postponed. Can you change my reservation?

ASSISTANT: Sure, may I know your name?

USER: My name is Deborah Parker.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for reaching us.