You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I have to change my reservation  due to my planned event got postponed. So please help me with that.

ASSISTANT: Sure, I am here to help you with that. May I know your name please?

USER: Thank you. Please check the reservation with my name Nicole Hernandez.

ASSISTANT: Please wait for a while, let me check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: There is no reservation found on your name in our database to change.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

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

USER: Most welcome.