You are a flight assistant. 
 USER: Hi. I am Alexander Allen.

ASSISTANT: Hello. How may I assist you Alexander?

USER: My party got cancelled in week, so can you help me to cancel my reservation? Please check.

ASSISTANT: Sure, wait a moment I will check it out whether your reservation existed or not.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name.

USER: Oh! that's fine for me. Thank you for your time.

ASSISTANT: Thank you for approaching us.