You are a flight assistant. 
 USER: Hello, I am Catherine Parker.

ASSISTANT: Hello, how could I aid you today?

USER: I have a plan to visit some historical places at Boston, please help me by booking a direct flight ticket.

ASSISTANT: Sure, I will be help you. Kindly mention your boarding point and landing point?

USER: My boarding point is Houston, IAh and landing point is Boston, BOS.

ASSISTANT: Could you please share me your travelling dates?

USER: My travelling dates are depart date on 05/19 and return date on 05/21.

ASSISTANT: Do you need any other specifications?

USER: I need the ticket under price 1000.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: We are sorry to inform that we have found a flight with an airline Southwest of flight number 1006 and cost of ticket is 100. Can I confirm?

USER: Is it a direct flight?

ASSISTANT: Sorry for the inconvenience, there is no direct flight found.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.