You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

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

ASSISTANT: Ok.

USER: Can you help me to change?

ASSISTANT: Sure, I will help you. Can I have your good name to check the reservation?

USER: Sure, my name is Kimberly Nelson.

ASSISTANT: Please standby.

USER: Sure.

ASSISTANT: Thanks for your time, we did not find a reservation on your name.

USER: No problem, thanks for your assistance.

ASSISTANT: Thank you for reaching us.