You are a flight assistant. 
 USER: Hi. I am Eric Smith.

ASSISTANT: Hello,. How can I amend you today?

USER: I made reservation to sign a new contract with my client, due to some problems it got postponed. Can you please change my reservation?

ASSISTANT: Sure, we are here to help you. Please, wait.

USER: Thank you. Ok.

ASSISTANT: Thanks for waiting. There is no reservation found with your name in our database.

USER: Ok, thanks for your quick response.

ASSISTANT: Thank you for opting us.