You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Due to having an emergency meeting with my family, I would like to change my recent reservation.

ASSISTANT: Sure, I can do that for you. Let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately we did not find any reservations on your name.

USER: Thank you for your service.

ASSISTANT: May I know your name?

USER: I am Mark Martinez.

ASSISTANT: Thank you for contacting us.

USER: Thank you.