You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am George Martin. Can you help me in booking my flight ticket from SFO to PHL?

ASSISTANT: Sure, can you please share your travel dates?

USER: My trip dates will be Apr 14th to Apr 16th.

ASSISTANT: Do you have any class preference?

USER: I am ok, with any class.

ASSISTANT: May I know your connection limit?

USER: I prefer  a connecting flight.

ASSISTANT: Do you have any other specification that you are looking for?

USER: My return flight should be in the afternoon.

ASSISTANT: George Martin, there is no flight available at your request.

USER: Its ok, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.