You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Lee.

ASSISTANT: How can I assist you?

USER: I need some help in changing my recent booking due to postpone of my son presentation in an international competition. Can you help me in altering my booking?

ASSISTANT: Sure, I will help you with that, give me a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found on your name.

USER: No problem with that, thank you for your quick help in providing your information.

ASSISTANT: Thank you for contacting us, have a great day.