You are a flight assistant. 
 USER: Hi. I am Katherine Taylor.

ASSISTANT: Hello, how may  I assist you today?

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

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for your time, sorry, no reservation found with provided name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for approaching us.