You are a flight assistant. 
 USER: Hi, I am Donna Lee.

ASSISTANT: Hello, how can I aid you?

USER:   I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you help me with changing reservation?

ASSISTANT: Sure, I am willing to help you. Please stand by I will get back to you.

USER: Ok.

ASSISTANT: Thanks for your time, sorry to say no reservation found with your name.

USER: OK, no issues.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thanks for the help.