You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I serve you ?

USER: I am Melissa Harris. Could you please help me out with ticket booking?

ASSISTANT: Could you please let me know your source and destination?

USER: I need to fly to Denver, CO-DEN from Minneapolis& St.Paul, MN-MSP.

ASSISTANT: May I know when you want to travel?

USER: My arrival day is on Sep 4 and departure is on Sep 2.

ASSISTANT: Please wait a while I will get back to you.

USER: OK,.

ASSISTANT: Thanks for being patient. There is a flight which matches your details. Flight details are: airline:Frontier, flight number:1008 with price 100.

USER: OK, you can proceed with booking.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for contacting us.