You are a flight assistant. 
 USER: Hi, I am Angela Wilson.

ASSISTANT: Hello, 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 wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name.

USER: That's Ok. Thanks for your support.

ASSISTANT: Thank you for choosing us.