You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Young.

ASSISTANT: How may I help you today?

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?

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you so much for considering my request.

ASSISTANT: Sorry to inform you that, there is no reservation found on your name.

USER: No issues with that one, thank you for your help.

ASSISTANT: Thank you for reaching us.