You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Virginia Perez here.

ASSISTANT: Virginia Perez, how may I aid you?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation.

ASSISTANT: Sure, please give me a moment to check your ticket status.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation is available by your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.