You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Raymond White here. Can you change my reservation?

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: Raymond, I have searched our database but I didn't find any active reservation under your name to do modifications in that.

USER: No problem, thank you.

ASSISTANT: Thank you so much for contacting us, have a great day.