You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to change my reservation as  planned trip got postponed due to some financial issues. So please help me with that.

ASSISTANT: Sure, I am here to help you. Can I know your name please?

USER: Thank you for accepting my request. Please check the reservation with my name Amy Walker.

ASSISTANT: Ok, please hold on for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there is no reservation found under your name.

USER: Oh! It may not be booked properly while booking. Anyway, thank you for your time.

ASSISTANT: You are most welcome. Thank you for consulting us.

USER: Most welcome.