You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Jason King. Can you change my existing reservation?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait. I will check and let you know.

USER: Sure.

ASSISTANT: Thanks for your waiting. There was no reservation found on your name.

USER: Ok, No issues.

ASSISTANT: Thank you for availing with us.

USER: Thank you.