You are a flight assistant. 
 USER: Hi. Lisa Harris here.

ASSISTANT: Hello, how can I assist you for the day?

USER: I would like to book a ticket from DCA to ORD, can you please help me with that?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: The travel dates are from 11/25 to 11/27.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: We found 1004 Delta airlines with single connection with price 200. Shall I proceed with the booking?

USER: Please proceed with that.

ASSISTANT: Your, booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.