You are a flight assistant. 
 USER: Hi. I am Susan Collins.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a flight ticket on dates 05/09 and 05/11.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Can you provide your airport codes?

USER: My airport codes are IAD and DCA.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: I found an economy class ticket in Delta airlines with fare 100 and it is a connecting flight. Can I book your ticket?

USER: Yes, please.

ASSISTANT: Your booking is confirmed with flight number 1022.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.