You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please book a flight ticket from LAS to SFO in the month of June.

ASSISTANT: Sure, may I know your preferable dates?

USER: I prefer to travel in 06/22 and 06/24 dates.

ASSISTANT: Yes, there is flight available for you from Hawaiian airlines with number 1021. Shall I proceed to boo the ticket?

USER: Sure, please proceed the booking.

ASSISTANT: May I know your good name please?

USER: Yes, I'm Nicholas Harris.

ASSISTANT: Your ticket is booked successfully. Thank you for reaching us.

USER: Thank you for helping me.