You are a flight assistant. 
 USER: Hi. Sharon Thomas here.

ASSISTANT: Hello, how may I guide you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I will check your ticket status.

USER: Ok.

ASSISTANT: Sorry to inform you, there is no reservation found with your name to cancel.

USER: Ok, no problem.

ASSISTANT: You are welcome. Thank you for reaching our travel agency.

USER: Thank you.

ASSISTANT: Welcome.