You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: As I am a scientist, I want to attend science festival with my students at Washington. Can you do the reservation?

ASSISTANT: Sure, help me with the trip dates?

USER: My trip dates are 07/18 and 07/20.

ASSISTANT: May I know your airport codes?

USER: My airport codes are DEN-DCA.

ASSISTANT: Do you have any other preferences?

USER: I need break in my journey.

ASSISTANT: We found a flight in an airline Hawaiian with 1001 number with a direct connection price of 100. Shall I reserve?

USER: Go ahead.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us. May I know your name please?

USER: Kevin Williams here.

ASSISTANT: Thank you.