You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is George Adams.

ASSISTANT: How can I assist you today?

USER: Due to some personal issues, I would like to postpone my journey. Can you help me in changing my existing reservation?

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: There is no reservation found under your name.

USER: Its ok, I guess I made a mistake while booking. Anyways, thank you for the information.

ASSISTANT: Welcome, have a great day.