You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what is your good name?

USER: My name is David King.

ASSISTANT: OK King, what can I do for you?

USER: We friend's are planning a trip to San Francisco. Could you please help me in booking a flight ticket from DTW to SFO.

ASSISTANT: OK, can you please provide me the trip dates?

USER: The dates are 07/21 and 07/23.

ASSISTANT: OK, please wait a moment.

USER: OK.

ASSISTANT: King, I found a flight airlines Southwest with flight number 1015.

USER: OK, please book the ticket.

ASSISTANT: OK, your ticket is booked successfully. Have a safe journey.

USER: OK, thank you for your help.

ASSISTANT: Thank you for reaching us.