You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, we are here to help you to change it. Kindly mention your name.

USER: Sure, I am Pamela Lee.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok. Thank you for your service.

ASSISTANT: Thank you for reaching us.