You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What kind of assistance are you seeking from me?

USER: Myself Shirley Lewis, can you help me in modifying the reservation which I did recently?

ASSISTANT: Sure, I will help in modification of your reservation.

USER: Ok, thank you for the help.

ASSISTANT: Sorry to say this Lewis, I am not able to find an active reservation under your name to change.

USER: That's ok, not a problem. Anyways, thank you for providing the information of my reservation status.

ASSISTANT: You are most welcome, thank you for choosing our service. Hope you have a nice day.