You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: May I know your name?

USER: Yes, I am Mark Martinez.

ASSISTANT: We found a reservation under your name, and it has been cancelled successfully.

USER: Thank you for your valuable help.

ASSISTANT: Thank you for reaching us.