You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me in changing my recent reservation?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Can you please share me your name?

USER: Myself Melissa Rodriguez.

ASSISTANT: Sorry, no reservation found on your name to change your reservation.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for opting us, have a nice day.