You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name to check your reservation status?

USER: Sure, my name is Sandra Jones.

ASSISTANT: Ok, please be on hold.

USER: Sure, I will wait.

ASSISTANT: Sorry, we could not find any reservation with your name.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for choosing us.