You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Susan Smith here, I want to reserve my ticket from IAD to BOS, can you please help me to book a ticket?

ASSISTANT: Sure, could you please let me know your travel dates?

USER: Sure, my dates of journey is from 04/01 to 04/03. Please make sure that the price limit is 500.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight-1005 available with Delta airlines and the ticket fare is 100 only. Are you comfortable with this flight?

USER: Ok, you can book it.

ASSISTANT: I have booked your ticket successfully. Happy journey.

USER: Thank you for a help in booking a ticket.

ASSISTANT: You are welcome and thank you for choosing us.