You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jessica Parker.

ASSISTANT: How can I assist you today?

USER: I need to do some changes in my previous reservation as I have given some wrong details while booking earlier. So please help me with that.

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Thank you. I will wait for your response.

ASSISTANT: Jessica, there is a no reservation found under your name.

USER: No, clearly I remember that my reservation has done in the previous month so you have to check once again for my reservation.

ASSISTANT: I have a double checked and see that there is no reservation found under your name.

USER: It's ok fine, I will check my mail once again and reach you again if anything fault. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.