You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Ok, please check for the name Richard Johnson.

ASSISTANT: Please wait while I'll check your reservation status in our database.

USER: Ok, please take your own time.

ASSISTANT: Richard Johnson, there is no active reservation found under your name to do modifications in that.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us, have a nice day.