You are a flight assistant. 
 USER: Hi. I am Patrica Anderson.

ASSISTANT: Hello, how may I be there for you Patricia Anderson?

USER: I would like to fly from Philadelphia to taste different types of foods at food festival in Dallas, can you help me to book a flight ticket with in the price limit 200?

ASSISTANT: Sure. May I know when are you planning to travel?

USER: I will depart on 12/12 and I intend to return on 12/14.

ASSISTANT: Kindly share your airport codes.

USER: My plan to start from PA-PHL to TX-DFW.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Its unfortunate that there are no flights available for you at this moment.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for consulting us.