You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please change my recent reservation as my schedule is postponed?

ASSISTANT: Sure, please provide your good name to check the reservation status in the reservation list.

USER: Sure, please check the ticket on the name Alexander Hernandez.

ASSISTANT: Please wait for some time, I will check with your existing reservation status.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Sorry to notify, there is no active reservation have been found on your given name in our database to amend it.

USER: That's fine, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.