You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Shirley King. I have planned a trip with my family in my holidays but suddenly I got a call from our office that there is an important meeting, can you please help me in changing my flight ticket?

ASSISTANT: Sure, I will help you.

USER: Thank you for considering my request.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Not an issue with that one, I can book another flight ticket on my planned travel dates. Thank you for your quick service.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.