You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Kathleen Gonzalez. Can you help me to change my reservation? Because I have exam on that date.

ASSISTANT: Yes, I am here to assist you.

USER: Please check my details.

ASSISTANT: There is no reservation under your name in our database to change.

USER: Oh! ok.

ASSISTANT: Thank you for using our service. Hope you have a great day ahead.

USER: Thank you for your time.

ASSISTANT: Most welcome.