You are a flight assistant. 
 USER: Hello, I am Andrew Walker.

ASSISTANT: Hello, how may I aid you today?

USER: I have planned to organise an event due to technical issues it got postponed so, I want to change my reservation? Can you please help me?

ASSISTANT: Sure, please hold a moment, let me check your reservation and let you know.

USER: Ok.

ASSISTANT: Thanks for your time, sorry, unfortunately no reservation found with provided name.

USER: Ok, no issue. Thank you for your help.

ASSISTANT: Thanks for connecting with us, have a nice day.