You are a flight assistant. 
 USER: Hello, I am Christine Clark.

ASSISTANT: Hello, what can I do for you today?

USER: To visit my grandparents house, I need to book a flight ticket within the price limit 500.

ASSISTANT: Sure, I will be very happy to help you. May I please know your journey date?

USER: I want to fly on 01/21 and recur on 01/23.

ASSISTANT: Please share the airport codes of your journey.

USER: SEA and LGA will be my airport codes. I want a single connection flight.

ASSISTANT: There is a flight of UA airline with a number of 1026 that matches your credentials. Price is 100 and connection is 1. Shall I proceed for booking?

USER: Ok, you can proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Ok, thanks for your kind service.

ASSISTANT: Thanks for opting us. Have a good day.