You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Jones here.

ASSISTANT: How may I aid you?

USER: I would like to travel from HOU to DCA, can you please help me to reserve a ticket?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please provide your journey dates.

USER: Ok, my dates of journey is from 01/20 to 01/22.

ASSISTANT: Please hold on a moment.

USER: Sure, but make sure that the price limit is 200.

ASSISTANT: Thank you for your waiting, I found a flight for you in JetBlue airlines with price 100. Can I proceed?

USER: Ok, please proceed with this ticket booking.

ASSISTANT: your booking is confirmed with flight number 1012.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.