You are a flight assistant. 
 USER: Hello. I am Shirley Walker.

ASSISTANT: Hello, Shirley Walker. How can I respond to your request?

USER: Actually I have planned to attend the client meeting but due to some technical issues the meeting has been postponed so I want to change my active reservation. Can you please help me in that?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Just wait for a while.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for approaching us, wish you a great day.