You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Barbara Young.

ASSISTANT: Barbara, how may I assist you today?

USER: I want to attend a live event in San Francisco.Can you help me to book a flight ticket?

ASSISTANT: Sure, I am happy to help you, may I know your airport codes?

USER: I would like to travel from DCA to SFO.

ASSISTANT: Let me know your travelling dates to proceed further?

USER: I want to depart on 10/23 and return by 10/25.

ASSISTANT: Ok, wait for a moment please.

USER: Sure, take your time.

ASSISTANT: I found a flight that Frontier airline with connection 1 price 100 as per your details, can I proceed to booking?

USER: Yes, proceed to booking.

ASSISTANT: Your ticket is confirmed with flight number 1009.

USER: Thank you for helping me out.

ASSISTANT: My pleasure, have a nice trip.