You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best render you now?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, may I know your good name please?

USER: Myself Eric Gonzalez.

ASSISTANT: Ok, please wait for some time.

USER: Ok.

ASSISTANT: Unfortunately, there is no active reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for reaching us, wish you a great day.