You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Betty Anderson.

ASSISTANT: Nice to meet you Betty.

USER: Can you please change my existing reservation as my plan to meet my friend got postponed?

ASSISTANT: Sure, I will help you with the change of flight reservation. Please wait.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name to change it.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you.