You are a flight assistant. 
 USER: Hello, I am Robert Hernandez.

ASSISTANT: Hello, how may I abet you?

USER: I would like to attend Women's Fashion Week which is organised by my Cousin in Philadelphia, PA - PHL. Can you hold me a flight ticket with in the range of 500?

ASSISTANT: Sure, Can I have your trip dates?

USER: I will fly on 07/12 and return on 07/14.

ASSISTANT: Help me with the source code?

USER: My source code is from Chicago, IL - ORD.

ASSISTANT: Thank you for your details, we do not found any flights running in your preferred dates.

USER: Ok, thank you.

ASSISTANT: Thank you for your reaching us.