You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I have an appointment to meet my family doctor. Can you please book a ticket from PHL to LAS?

ASSISTANT: Sure, may I know your planned journey dates?

USER: I planned to depart on 06/06 and return on 06/08.

ASSISTANT: Do you want connecting flight?

USER: Yes, I want a connecting flight.

ASSISTANT: May I know your good name?

USER: My name is Patrick Collins.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, it's not an issue. Thanks for your prompt response.

ASSISTANT: Thank you for opting us.