You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Ok, I can help you to make it easy.

USER: Thank you.

ASSISTANT: Let me know your name first to check the status of your reservation?

USER: I am Janet King.

ASSISTANT: Sorry, we did not find any reservation on your name.

USER: It's ok, not a problem.

ASSISTANT: Thanks for consulting us, have a nice day.

USER: Thanks for your information.