You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to amend my reservation as my schedule got postponed as our client is not able to travel today here to Seattle. Can you please help me to modify my reservation which I have done under my name Mary Smith?

ASSISTANT: Sure, I am gleeful to assist you in that one.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Ok, have your time.

ASSISTANT: As per your request, there is no ticket booking found on your name to modify it.

USER: It's ok, it might be cancelled by my manger as he received the information about the client. Anyway thank you for the help.

ASSISTANT: You are most welcome and thank you for reaching us.

USER: You are most welcome.

ASSISTANT: Welcome.