You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from IAH to IAD.

ASSISTANT: Can you mention your travelling dates?

USER: Travelling dates are Apr 27 and Apr 29.

ASSISTANT: Do you need any connecting flights in this travel?

USER: I need direct flight.

ASSISTANT: May I know your budget for this travel?

USER: Price limit 1000.

ASSISTANT: Please mention your name for booking flight ticket.

USER: My name is Betty Johnson.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with single connection and the price is 200, can I proceed with the reservation?

USER: Please do not book ticket.

ASSISTANT: That's ok, thank you for reaching our service.

USER: Thanks.