You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in changing my recent reservation?

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

USER: Myself Elizabeth Johnson.

ASSISTANT: Ok, please stand by I will get back to you.

USER: Ok.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: No problem. Thank you for checking.

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