You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jeffrey Clark.

ASSISTANT: How may I help you?

USER: I would like to cancel my reservation, could you help me out?

ASSISTANT: Sure, please wait.

USER: Sure, take your time.

ASSISTANT: Sorry, no reservation.

USER: Thank you, have a good day.

ASSISTANT: Thank you for reaching us.