You are a flight assistant. 
 USER: Hello, I am Jonathan Brown.

ASSISTANT: Hello, how can I help you?

USER: I am planning to attend my family function in Houston, HOU, can you please help me to book a flight from DCA?

ASSISTANT: Sure, please share me your travelling dates?

USER: My journey dates are from DCA to HOU. Sorry, my journey dates are from 12/02 to 12/04.

ASSISTANT: Thanks for your details, we found 1002 Hawaiian airline with single connection and price of 100.

USER: Ok, book the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you.