You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to change my existing reservation, can you help me in making some changes in my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know on  which name the ticket has been reserved?

USER: Please check with the name of Ashley Lewis.

ASSISTANT: Ok, please wait for a while, I will check and revert to you.

USER: OK.

ASSISTANT: Sorry to inform you that, there is no reservation found against your name.

USER: That's not a problem, leave it. Thanks for your kind response.

ASSISTANT: Thank you for reaching us.