You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Michelle Parker.

ASSISTANT: How may I assess you at this time?

USER: There is an emergency case which came to hearing on the dates which I have planned to enjoy in my holidays, so I am unable to travel the trip due to this one. Can you please help me in changing my flight ticket booking?

ASSISTANT: Sure, I am ready to help you.

USER: Thank you for considering my request.

ASSISTANT: Sorry, no reservation found on your name.Have a nice day.

USER: Ok, no problem with that one. Thank you for your clarification about my ticket reservation.

ASSISTANT: Thank you for opting us.

USER: Welcome.