You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I help you today?

USER: I am Kathleen Hill. I just want to change an existing reservation as my meeting got post pone due to some technical issues.Can you help me?

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: There is no reservation found with your given name in our data.

USER: No issue.

ASSISTANT: Thank you.

USER: Thank  you.