You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I made a reservation earlier to attend a business meeting. But, it got postponed due to some technical issues.

ASSISTANT: Ok.

USER: Can you please change my existing reservation?

ASSISTANT: Sure, I am ready to aid you in changing the ticket details. May I know your respective name please?

USER: I am Linda Nelson.

ASSISTANT: Ok, please hold on for a couple of seconds. I will be back soon.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there is no reservation with your name to change the ticket details.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: You are welcome. Thank you for approaching us.