You are a flight assistant. 
 USER: Hi. I am Charles Martinez.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit one of the haunted places in Philadelphia PA-PHL, to shoot a film documentary. Can you please aid me in booking a plane ticket?

ASSISTANT: Sure, I will help you in that. May I know your travel dates of travel?

USER: I would like to depart on 10/12 and arrive on 10/14.

ASSISTANT: Can you please share your source point?

USER: My source point is Washington DC-IAD.

ASSISTANT: Do you have any specifications?

USER: I need a halt. I can spend upto 200.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there no flights found on your specified price limit.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for opting us.