You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Robert Lewis.

ASSISTANT: How may I guide you?

USER: My meeting got postponed and I would like to postpone my journey. Can you help me in changing my reservation?

ASSISTANT: Sure, please wait for a minute.

USER: Ok, take your time.

ASSISTANT: There is no reservation found with your details, Robert.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for approaching us.