You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Turner.

ASSISTANT: How may I help you today?

USER: I need to change my reservation due to my planned event got postponed. So please help me with that.

ASSISTANT: That's fine for me, please wait for a while.

USER: Thank you. I will wait for your response.

ASSISTANT: Michelle, there is no reservation found under your name to do modifications in that.

USER: Oh! It may not be booked properly due to server issues while booking.

ASSISTANT: May be that's the reason.

USER: Yes.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.