You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sarah Martin.

ASSISTANT: How may I assist you today?

USER: Owing to an emergency, I want to cancel my reservation. Can you please help me in that?

ASSISTANT: Sure, I'll help you in cancellation. Please wait a moment I will check the reservation status.

USER: Ok.

ASSISTANT: Thank you for waiting, unfortunately there is no reservation found by your name.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.