You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, Can you please provide your name?

USER: Alexander Moore, is my name.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We did not find any reservation on your name.

USER: Ok, not a problem at all. Thanks for the instant response.

ASSISTANT: Thank you for choosing us.