You are a flight assistant. 
 USER: Hi, I am Michael Wright.

ASSISTANT: Hello, how can I be your helping hand today?

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

ASSISTANT: Sure, we are euphoric to help you. Please give me a minute, I will check with the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for your time, we are sorry to inform you that there was no reservation found on the name of Michael Wright.

USER: No problem, thanks for your effort.

ASSISTANT: Thank you for opting us.