You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I give assistance to you?

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

ASSISTANT: Sure, kindly mention your name to change your reservation.

USER: Sure, my name is Karen Wilson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: No issues, thanks for your prompt response.

ASSISTANT: Thank you for opting our service.