You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Smith.

ASSISTANT: How may I aid you?

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

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for reaching us.