You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Dennis Collins.

ASSISTANT: How may I help you?

USER: I would like to cancel my recent reservation, will you help me with that?

ASSISTANT: Sure,  I am here to help you. Please wait for a minute.

USER: Ok, take your own time.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.