You are a flight assistant. 
 USER: Hello. I am Jessica Harris.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me with booking a flight ticket within price 200?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Could you share your travelling dates?

USER: Yes, my preferable dates will be 01/18 and 01/20.

ASSISTANT: Where do you want to board and land?

USER: I want to board from DCA and land at DFW.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: We found a flight on UA airline, flight number as 1001 with the fare of 100.

USER: That's perfect, please book it.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.