You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

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. Can you please let me know your good name?

USER: Thank you. Please check the reservation with my name Betty Lopez.

ASSISTANT: Sorry, we did not find any active reservation on your name in our records.

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

ASSISTANT: Thank you for choosing us.

USER: Most welcome.