You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit San Francisco to meet my college friends, please book a ticket from PHL to SFO.

ASSISTANT: Sure, can you please tell your travelling dates?

USER: My travelling dates are 10/04 to 10/06.

ASSISTANT: Do you have any connection limit?

USER: I need 1 connection limit.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Ok, thank you for your information.

ASSISTANT: Can you please tell your name?

USER: My name is Daniel White.

ASSISTANT: Thank you and have a nice day.