You are a flight assistant. 
 USER: Hello,. I am Emma Thomas.

ASSISTANT: Hello, what kind of service you are expecting from us?

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

ASSISTANT: Sure, I can help you. Please wait a minute.

USER: Ok.

ASSISTANT: I regret that there is no reservation found on your name.

USER: No issues, thanks for the information.

ASSISTANT: Thanks for reaching our services.