You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Please help me in changing my recent reservation.

ASSISTANT: Sure, can I have your name please?

USER: Justin Jackson here.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.