You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning for a long trip to Boston, MA-BOS on 12/15, could you please assist me with that? I need a stopover in my journey.

ASSISTANT: Sure, can you please provide your other details of journey.

USER: I would like to return on 12/17 to PA-PHL.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: Ok.

ASSISTANT: Sorry there is no connecting flight matching your locations.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us, have a good day. May I know your name?

USER: My name is Melissa Mitchell.

ASSISTANT: Thank you.