You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I would like to head from Washington to meet my grandparents at Houston. Can you help me book a flight ticket within the price of 500?

ASSISTANT: Sure, could you please provide me with your dates of travel on which dates you are going to travel?

USER: I have planned to travel on 08/23 and 08/25.

ASSISTANT: Ok, may I know your respective airports codes please?

USER: My journey is from DCA to IAH.

ASSISTANT: May I know your name please?

USER: Elizabeth Lewis is my name.

ASSISTANT: Lewis, there is a flight with the connecting flight of fare 100 and the airline is Delta, are you ok with this booking?

USER: Go ahead for booking.

ASSISTANT: Your ticket has been reserved with the flight number 1017.

USER: Thank you for your service.

ASSISTANT: You are welcome, have a happy journey.