You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Collins.

ASSISTANT: What service you are expecting from us?

USER: I would like to cancel my reservation as I am having my examinations , can you please help me out?

ASSISTANT: Ok, I am happy to help you.

USER: Thank you.

ASSISTANT: Please wait a minute, I will check and get back to you.

USER: Sure, take your time.

ASSISTANT: Sorry for the trouble, there is no reservation found with your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: It's my pleasure. Thank you for reaching us.