You are a flight assistant. 
 USER: Hi, I am Timothy Hall.

ASSISTANT: Hello, How may I help you out?

USER: I would like to change my reservation as my meeting with my friend got postponed.

ASSISTANT: Ok.

USER: Can you help me with changing my reservation?

ASSISTANT: Sure. Please wait a moment.

USER: Ok.

ASSISTANT: There is no flight reserved on your name. Thanks for approaching our agency.

USER: Thanks.