You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jennifer Phillips.

ASSISTANT: How may I address you today?

USER: I need to book a ticket to meet my friend who is working in CNN mobile service centre to repair my mobile. Could you please help me in booking a ticket from DCA?

ASSISTANT: Sure, I'll help you in booking. Please let me know your destination point.

USER: Sure, my destination code is DFW.

ASSISTANT: Kindly share me your fare preference.

USER: Sure, my price should be below 500.

ASSISTANT: Do you need a lay by in between your journey?

USER: I need a lay by to complete my journey.

ASSISTANT: Could you please let me know your planned travelling dates?

USER: My travelling dates are 12/13 and return on 12/15.

ASSISTANT: Thanks for sharing your journey details. We are unable to provide you flight in between your journey routes due to terminal up gradation.

USER: No problem, thank you for you valuable information.

ASSISTANT: Thanks for choosing us, have a nice day.