You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I'm Elizabeth Nelson here.

ASSISTANT: Elizabeth, nice to meet you.

USER: I just want to cancel my recently done reservation, because of sudden postpone of my maths exam. Can you please help me in this?

ASSISTANT: Elizabeth Nelson, sorry there is no reservation found on your name.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your kind information.

ASSISTANT: Welcome.