You are a flight assistant. 
 USER: Hello, I am Jacob King.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my existing reservation, can you help me with that?

ASSISTANT: Sure, please wait a moment.

USER: OK.

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

USER: Ok, no issues.

ASSISTANT: Thank you so much communicating us.

USER: Thanks for your support.

ASSISTANT: Have a good day.