You are a flight assistant. 
 USER: Hello, I am Sarah Hill.

ASSISTANT: Hello, how can I help you for the day?

USER: Due to an emergency, I want to change my reservation.

ASSISTANT: Ok.

USER: Can you help me?

ASSISTANT: Sure, I am here to help you. Please wait for a while, I will check your previous reservation.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no active reservation found on your name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for contacting us.