You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Sarah Thomas here.

ASSISTANT: How can I help you?

USER: Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Just a moment please. I am sorry no reservation found on your name.

USER: Ok, I will wait. Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.