You are a flight assistant. 
 USER: Hello. I am Jeffrey Hall.

ASSISTANT: Hello Jeffrey Hall, what can I do for you?

USER: Me and my friends have a plan to visit San Francisco on this winter season, can you help me for book a flight ticket?

ASSISTANT: Oh! that's nice. Surely I will help you. Please give me your journey dates.

USER: My departure day is 04/14 and return day is 04/16.

ASSISTANT: Can you help me with your airport codes please?

USER: My airport codes are MI-DTW and CA-SFO.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: I found a flight from Hawaiian airline with the number 1019. Shall I proceed booking?

USER: Can you tell me the connection limit and price limit?

ASSISTANT: Yes, price is 600 and connection is only 1.

USER: Sorry I want a ticket with maximum price 500.

ASSISTANT: Oh! that's fine Jeffrey Hall.

USER: Thank you for your service.

ASSISTANT: Do you need anything else from us to help you?

USER: No thanks.

ASSISTANT: Thank you for choosing us.