You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Patrick Gonzalez. Can you please book a flight ticket from ORD to DCA?

ASSISTANT: Sure, tell me your travel dates please?

USER: My travelling dates are 05/15 and 05/17.

ASSISTANT: Do you have any preferences?

USER: I need a ticket under normal cost.

ASSISTANT: Thanks for your patience. I have found Delta airlines which flies with one connection.

USER:  You can proceed with booking.

ASSISTANT: I have confirmed your flight ticket in flight number 1005. Thank you.

USER: Thank you for the help.