You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please help me with booking a flight reservation from PHL to SFO please?

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My journey dates are from Jan 13th to Jan 15th.

ASSISTANT: Ok, do you have any other requirements?

USER: My depart time will be in morning.

ASSISTANT: May I know your name?

USER: My name is Carol Miller.

ASSISTANT: Do you have any specifications?

USER: I need a flight with 1 connection.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights found based on your journey details.

USER: Oh! That's fine. Thank you for checking anyways.

ASSISTANT: Thank you for approaching us.

USER: You are welcome.