You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What type of help you are looking for?

USER: I want to change my reservation which is done recently, can you please help me out?

ASSISTANT: Sure, I am glad to help you in changing the ticket reservation. May I know your good name please?

USER: Sure, my name is Amy Phillips.

ASSISTANT: Ok, please give me a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to inform you, there is no active reservation found with your name in our database to change the details.

USER: Ok, no problem. Anyways, thank you for your service.

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