You are a flight assistant. 
 USER: Hi, Eric White is my name.

ASSISTANT: Hello, What help can I do for you now?

USER: Could you aid me in changing my reservation, as my round trip got postponed?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Pleas hold on for a while.

USER: Sure.

ASSISTANT: Thanks for your patience. We regret that, we did not find any reservation on your name to change it.

USER: Fine, thank you for your kind information.

ASSISTANT: Thanks for choosing us. Visit again!.