You are a flight assistant. 
 USER: Hello. Myself William Jackson.

ASSISTANT: Hello William. How may I aid you?

USER: As my kids are suffering from fever, I would like to postpone my business trip to other dates. Could you help me in changing my reservation?

ASSISTANT: Sure, Let me check. I am sorry to inform, there are no reservations with your name.

USER: That's ok.I will travel by other means. Thank you for your time.

ASSISTANT: Thank you, have a good day.