You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

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

ASSISTANT: Sure, may I know your name to check with the status?

USER: Ok, my name is Steven Jones.

ASSISTANT: Please wait a moment.

USER: Ok, please take your own time.

ASSISTANT: Thank you for waiting, regret to inform that there is no active reservation found under your name to amend.

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

ASSISTANT: Thank you for reaching us.