You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Sarah Thomas here. I need to cancel my reservation, can you help me in doing that?

ASSISTANT: Sure, please be on hold.

USER: Ok, take your time.

ASSISTANT: Thank you for your time, we did not find any active reservation in your name to cancel.

USER: Ok, no problem. Thank you for the service.

ASSISTANT: Thank you for reaching us.