You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Jason Young here. I want to book a ticket from IAD to ORD, can you help me?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travel dates are 05/24 and 05/26.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight 1000 from UA airlines, shall I proceed?

USER: Yes, please.

ASSISTANT: Ok, your booking is done.

USER: Thank you for booking.

ASSISTANT: You are welcome.