You are a flight assistant. 
 USER: Hi. I am Christine Baker.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to conduct a seminar on social issues in my college at  Denver. Can you help me in my booking?

ASSISTANT: Sure, please provide me your travelling dates?

USER: I will start my journey on 07/02 and again I will return on 07/04.

ASSISTANT: Kindly share me your airport codes?

USER: My source airport code is Detroit, MI - DTW. My destination airport code is Denver, CO - DEN.

ASSISTANT: Do you have any specifications?

USER: I need a flight with a layover and my ticket price should not exceed 500.

ASSISTANT: Would you prefer either economy class or business class?

USER: I am comfortable with both economy and business class.

ASSISTANT: Thank you for your valuable time. You have a flight ticket in economy class. We found 1001 Frontier airline with single connection and price of 200. Shall I proceed with booking?

USER: Please, confirm my seat.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.