You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: I am Ronald White. I would like to change my reservation as I am leaving  for family trip, can you please help me out?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Thank you. Sure.

ASSISTANT: There is no previous reservation available in your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for contacting us, have a good day.