You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Laura Hernandez, can I know if your can change my recent reservation please?

ASSISTANT: Sure, I can change your reservation.

USER: Ok.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found under your name to do changes in that.

USER: Thank you for helping me. Not a problem.

ASSISTANT: Thank you for choosing us.