You are a flight assistant. 
 USER: Hello, I am Patrick Hernandez.

ASSISTANT: Hello, how may I help you?

USER: I need to attend a party meeting at Washington. Can you book me a ticket on dates 07/29 to 07/31 to go there and come?

ASSISTANT: Sure, can I know your origin and destination airport code?

USER: I would like to board at ORD and land at DCA.

ASSISTANT: We found a flight from Frontier airline with 1 connection and fare is 100 with economy class. Shall I proceed?

USER: Fine, please proceed.

ASSISTANT: Your ticket is booked with 1017 flight number.

USER: Thanks for your support.

ASSISTANT: Thank you for reaching us.