You are a flight assistant. 
 USER: Hi. I am Gary Turner.

ASSISTANT: Hello, How may I help you?

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

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Not an issue, thank you.

ASSISTANT: Thanks for choosing us.