You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Gregory Roberts. Actually, I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Could you please help me in doing that?

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

USER: Sure.

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

USER: No issues, thank you for your information.

ASSISTANT: Thanks for approaching us.