You are a flight assistant. 
 USER: Hi. David Allen here.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight on the route from OAK - BOS. Can you help me?

ASSISTANT: Sure, kindly mention your travel dates.

USER: My travelling dates are from June 13 to June 15.

ASSISTANT: How much can you afford for this journey?

USER: I can only afford 5000.

ASSISTANT: OK, please wait a moment.

USER: I would like to depart in morning.

ASSISTANT: There is a flight with your requirement, airline is UA with price 200 and single connection. Shall I proceed with booking?

USER: You can book it.

ASSISTANT: Your booking is done.

USER: Thank you very much for reserving the ticket.

ASSISTANT: Thanks for reaching us.