You are a flight assistant. 
 USER: Hi, I am Susan Harris from Washington.

ASSISTANT: Hello, how can I help you?

USER: I would like to participate in Death Valley Adventure with my friends, so aid me in booking a flight on 07/23.

ASSISTANT: Sure, may I know your return date?

USER: My return date is 07/25.

ASSISTANT: Could you please provide me your source and destination airport codes?

USER: It's a round trip to DC - IAD.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need it.

ASSISTANT: We found a Delta airline, flight number: 1024, price: 200.

USER: Ok, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.