You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from PHL to HOU, can you please help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Apr 14 and return back on Apr 16.

ASSISTANT: Do you have any specifications?

USER: I prefer a normal cost airline.

ASSISTANT: May I know your name?

USER: My name is Eric Parker.

ASSISTANT: Sorry, there were no flights found on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.