You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Debra Wright, I am planning to visit Philadelphia to spend my holidays with my friend. Can you book a connecting flight for me?

ASSISTANT: Sure, we would be glad to help you. Please provide me your planned dates to travel.

USER: I will fly on 11/16 and return on 11/18.

ASSISTANT: Ok, can you please help me with the airport code of Philadelphia?

USER: I choose to land on PA-PHL airport.

ASSISTANT: From which airport are you willing to depart?

USER: I will depart from Dallas airport TX-DFW.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we have found a flight with price 700 and a halt in Hawaiian airline. Shall I proceed with the booking?

USER: No, fare of Hawaiian airline is more than my budget. Can you provide me a flight with in fare of 500?

ASSISTANT: Ok. Let me check.

USER: Ok.

ASSISTANT: Sorry Debra Wright, there is no flight available under price 500.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us.