You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My trip was postponed and I want to change my reservation, can you help me? My name is Jerry Brown.

ASSISTANT: Sure Brown. Please wait a moment. Thank you for waiting. Sorry, there is no reservation found under your name.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for approaching us.