You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you at present?

USER: I am Jonathan White want to organise an event at CO-DEN. Can you book a ticket from PA-PHL?

ASSISTANT: Sure, please let me know your depart date and return date as scheduled.

USER:  My travelling dates are 05/26 and 05/28.

ASSISTANT: Ok, how much do you want to spend on your ticket?

USER: I can spend 200 for the ticket.

ASSISTANT: Ok, please wait for a few minutes.

USER:  Ok.

ASSISTANT: Thank you for being patient, There were no flights found with your given details.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.