You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Actually, I want to change my reservation which is done recently due to some problems, can you please help me?

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

USER: Thank you. Sure, my name is Nicole Davis.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

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

USER: Ok, no problem.

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

USER: Anyways, thank you for your service.