You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Jones.

ASSISTANT: How may I assist you today?

USER: Can you book a flight ticket from IAD to MSP?

ASSISTANT: Yes, I can help you to book the flight ticket.

USER: Thank you.

ASSISTANT: May I know your preferred travel dates please?

USER: My travel dates will be Oct, 14 and Oct, 16.

ASSISTANT: Ok, which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Ok, is there any airlines preferences?

USER: No.

ASSISTANT: Ok, please hold on for a minute. I will let you know the flight details.

USER: Sure and my depart time should be at evening.

ASSISTANT: There is a flight in the Southwest airlines which is departing at 9:00 AM and returning at 15:00 PM. Can I reserve the flight ticket?

USER: Please go ahead.

ASSISTANT: Sorry,  I have given another flight details. Based on your requested specifications there is a flight in United airlines which is departing in the evening time. I. I have reserved your ticket with the UA airlines and the flight number is 1015. Have a safe flight.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for choosing our agency.