You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what can I do for you today?

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

ASSISTANT: Sure, please wait for few minutes.

USER: Thank you. Ok.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.