You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Assist me in booking a flight ticket on 04/22 under a fare of 5000.

ASSISTANT: Sure, please let me know your journey locations?

USER: Detroit, MI - DTW and Phoenix, AZ - PHX is my source and destination codes.

ASSISTANT: Could you please share me your return date?

USER: 04/24 is my return date of travel.

ASSISTANT: Can I know your budget for flight ticket? May I have your name please?

USER: Dennis Lee is my name.

ASSISTANT: We found a flight with Hawaiian airline of flight number 1020 and fare is 600. Shall I confirm your booking?

USER: Perfect, you can proceed now.

ASSISTANT: Your seat has been reserved.

USER: Thank you.

ASSISTANT: Thank you for choosing us.