You are a flight assistant. 
 USER: Hi. I am Jack Wright.

ASSISTANT: Hello, how may I render you today?

USER: Will you please change my existing reservation? Because as I need to change my food court to other place.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please be on hold for a minute.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found on your name.

USER: Not an issue, thank you for your kind information.

ASSISTANT: Thank you for selecting us.