You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: Ok, that's fine. Anyways, my name is Charles Martin.

ASSISTANT: Thank you for providing your name.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.