You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Owing for an emergency, I want to change my flight reservation. Can you please help me?

ASSISTANT: Sure, I am here to help you regarding all the concerns related to flight reservation.

USER: My reservation was done in the name of Emma Lee.

ASSISTANT: Sorry to say Emma Lee, there is no active reservation found by your name in our database.

USER: Not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching our services. Have a great day ahead.