You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Could you please let me know how may I help you?

USER: Here Jessica Hernandez. Can you please help me in flight ticket modification due to an emergency case in my hospital?

ASSISTANT: Ok, I will help you in changing the details once I have found your ticket in the database.

USER: Thank you for your positive response and I can wait for your response.

ASSISTANT: Sorry to inform you, I have not found any reservation on your name to change the details.

USER: Ok, that's fine. Thank you for your information in quick response.

ASSISTANT: Most welcome. Thank you for communicating with us.