You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have to change my reservation as I have to prepare for my exams, can you please help me?

ASSISTANT: Sure, I am here to assist you. Please tell us your name.

USER: My name is Jack Gonzalez.

ASSISTANT: Thank you. Please be online for a while, I will check your reservation status and let you know.

USER: Please take your time.

ASSISTANT: Sorry, I have not found any reservation under your name in our database.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome and thank you for choosing us.