You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Jessica Jackson here, I want to reserve my ticket within the dates from 04/18 to 04/20. Can you please help me in booking?

ASSISTANT: Sure, let me know your airport codes.

USER: Sure, my planned airport codes of journey are from HOU to DCA.

ASSISTANT: Please share your connection limit.

USER: Yes, I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: Yes, I need a airline preference which is having normal cost.

ASSISTANT: We found an UA airlines with single connection and flight number is 1013. Shall I proceed?

USER: Ok, you can book it.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you for your help in booking.

ASSISTANT: Thank you for choosing us.