You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation as my plan to go for trekking got postponed. Can you please check whether my reservation which was made by name Samuel Davis is active or not?

ASSISTANT: Sure, we are here to help you. Wait for a while.

USER: Sure.

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

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thanks for approaching us.