You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to travel from PHL to SFO, help me in booking a flight?

ASSISTANT: Sure, Please help me with your journey dates.

USER: My travelling dates are Mar 23 to 25.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connection flight.

ASSISTANT: May I know your name?

USER: I am Debar Martinez.

ASSISTANT: Is there any other requirements?

USER: I will be back on afternoon flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for opting us.