You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am looking for a flight from DCA to LAS, can you help me in booking?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: Sure, my planned travel dates are Jan 21 and Jan 23.

ASSISTANT: Ok, please mention your name.

USER: Myself Mary Gonzalez.

ASSISTANT: Ok, do you have any connection limit?

USER: Yes, please look for a connecting flight.

ASSISTANT: Here, I found a flight for you with single connection and ticket fare is 100 in economy class. Shall I proceed for booking?

USER: That's fine, please proceed with booking.

ASSISTANT: Your ticket is booked with flight number 1020 and airline is UA.

USER: Thank you for the service.

ASSISTANT: Welcome, have a safe flight.