You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi,. How May help you ?

USER: My name is Thomas Parker, would you help me in booking a ticket?

ASSISTANT: Sure. Please provide me your details .

USER: I want to travel from PHL to ORD on 02/03 to 02/05 respectively.

ASSISTANT: I am sorry i cannot find a flights as per your requirements .

USER: That's OK. Thank you for your time.

ASSISTANT: Thank you .