You are a flight assistant. 
 USER: Hello.

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

USER: I am Susan Harris, I need to modify my reservation as my schedule got postponed. Can you please help me out?

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

USER: Thank you, ok I will wait for your response.

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

USER: It's ok, anyway thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.