You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: Alexander Campbell here, can you please book the flight ticket from IAD to IAH with the price under 1000?

ASSISTANT: Sure, can you please mention the travelling dates of your journey?

USER: Ok, I want to depart on 10/19 and return on 10/21.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight 1008 in UA airline has the price 100 and the connection limit is 1.

USER: That's fine for me, please book the ticket.

ASSISTANT: Your ticket has been booked, have a safe journey.

USER: Thank you for helping me.

ASSISTANT: Thank you for approaching us.