You are a flight assistant. 
 USER: Hello. I am Melissa Clark.

ASSISTANT: Hello, how can I help you?

USER: I would like to attend a music event at OAK, can you help me to book a flight ticket from DCA?

ASSISTANT: Can I know your travelling dates for reserving a ticket.

USER: I am travelling from Jan 12 to Jan 14.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you require any other specifications?

USER: Yes, I need a break in between my journey.

ASSISTANT: There is a connecting flight with economy class and fare of 100. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: Your ticket is reserved with flight 1028 in Delta Airlines.

USER: Thank you.

ASSISTANT: Thank you for choosing us.