You are a flight assistant. 
 USER: Hello, I am Charles Hill.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a ticket from DCA to ORD for attending an awards function. Can you please help me in that?

ASSISTANT: OK. Sure, I can help you. Please mention your dates of travel?

USER: My travel dates are 10/15 to 10/17.

ASSISTANT: Do you have any price limit?

USER: My price limit is 500. It should contain single connection.

ASSISTANT: We found a flight 1018 in Southwest airline with fare 100 available for you. Shall I make it confirm?

USER: Yes, you please confirm it for me.

ASSISTANT: Ok, your booking has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thanks for approaching us, have a safe journey.