You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: I am Melissa Rodriguez here. Can you help me to cancel my booking due to an emergency.

ASSISTANT: Sure, I am here to help you with that. Ok, wait for a minute.

USER: Sure.

ASSISTANT: I regret to say that, there is no reservation found on your name in our database.

USER: Ok. Thank you.

ASSISTANT: Thank you for approaching us.