You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: My office colleagues are planning to go for trekking at Oakland hills, can you please help me in booking a ticket from IAD to OAK?

ASSISTANT: Sure, could you please mention your preferable dates of trip?

USER: I need to depart here on 11/15 and return from there on 11/17.

ASSISTANT: Ok, may I know your name please?

USER: My name is Brian Parker.

ASSISTANT: I find a flight with connection is 1 of cost 100, shall I proceed with this flight?

USER: That's perfect, please book the ticket.

ASSISTANT: Your booking is done successfully.

USER: Can you give me the flight details, please?

ASSISTANT: The flight number is 1012 and airline JetBlue.

USER: Thank you so much.

ASSISTANT: You are welcome.