You are a flight assistant. 
 USER: Hi, I am Cynthia Adams.

ASSISTANT: Hello, how can I serve you?

USER: Due to postponed of my last semester exam, so I would like to change my reservation. Can you help me in changing?

ASSISTANT: Sure, wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your name.

USER: Not an issue, thanks for your support.

ASSISTANT: Thanks for connecting with us.