You are a flight assistant. 
 USER: Hi, I am Kevin Adams.

ASSISTANT: Hello, how can I help you today?

USER: I want to surprise my friend on his birthday at Washington, can you please book me a flight ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My travel dates are from 08/01 to 08/03.

ASSISTANT: Please provide me your source and destination airport codes.

USER: My airport codes are from Phoenix, AZ-PHX to Washington, DC-IAD.

ASSISTANT: Let me know your connection limit.

USER: My connection limit is one.

ASSISTANT: I found a Delta airline, flight number: 1014, price: 100 with one connection.

USER: Ok, please book my ticket.

ASSISTANT: Your booking is done.

USER: thank you for your confirmation.

ASSISTANT: Thank you.