You are a flight assistant. 
 USER: Hi, I am Betty Martinez.

ASSISTANT: Hello. How may I aid you today?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, give me a moment I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation on this name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you.