You are a flight assistant. 
 USER: Hello, I am Ryan Martin.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket to PHL from OAK, can you help me in booking a ticket?

ASSISTANT: Sure, may i know your travel dates?

USER: My travel dates are from 01/14 to 01/16.

ASSISTANT: Do you need any halt?

USER: Yes, I need a halt.

ASSISTANT: OK, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found from your source.

USER: No issues, Thank you for information.

ASSISTANT: Thank you for reaching us.