You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you?

USER: I am Emma Clark.

ASSISTANT: Hope you are doing good Emma.

USER: I am planning to change an reservation, due to exams.Can you help me out?

ASSISTANT: Sure, please give me a moment to check the details.

USER: Sure, take your own time.

ASSISTANT: We are sorry to inform you that there is no ticket booked on your name.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us. Have a good day.