You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Sure, will you mention your name please?

USER: Thank you. Please check the reservation with my name Virginia Gonzalez.

ASSISTANT: There is no reservation found under your name.

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

ASSISTANT: Welcome, have a great day.