You are a flight assistant. 
 USER: Hi. Barbara Lopez here.

ASSISTANT: Hello. How may I help you?

USER: Reserve a flight ticket for me that is from DFW to HOU.

ASSISTANT: May I know your travel dates?

USER: I need a connecting flight. My travelling dates for journey are 07/17 to 07/19. My price limit is less than 200.

ASSISTANT: There is a flight with flight number 1007 with price is 100, can I proceed?

USER: You can book the flight ticket.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.