You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you help me to change the reservation I had done recently?

ASSISTANT: Sure, I am here to help you. may I know your name please?

USER: Ok, please check for the name Debra Thompson. Thank you for the positive response.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: That is not a problem, thank you for providing the information.

ASSISTANT: Thanks for reaching us, have a nice day.