You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Patrick Miller. I am looking for a direct flight, could you please help me with booking a flight ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: I would like to take off on 06/18 and return on 06/20.

ASSISTANT: Could you please provide the airport codes?

USER: My source and destination airport codes are same i.e PHL.

ASSISTANT: Ok, wait a moment please.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no direct flights on your route.

USER: That's ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Anyways, thank you for the information.