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, can you please help me in changing my existing reservation?

ASSISTANT: Sure, may I know your name?

USER: Sure, Robert Carter is my name.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Thanks for your information.

ASSISTANT: Thanks for reaching us, have a good day.