You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I would like to change my recent reservation, can you help me in doing that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know on whose name the ticket has reserved formerly?

USER: Samantha Allen. please check with that name.

ASSISTANT: Sorry Samantha Allen, there are no flights reserved on your given name formerly.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.