You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I am Betty Martinez, can you please help me in booking my flight ticket from PHL to BOS?

ASSISTANT: Sure, please share your journey dates.

USER: Ok, my journey dates are Jan 18 and Jan 20.

ASSISTANT: Ok, Do you have any class preference?

USER: I am comfortable with any of the class.

ASSISTANT: Do you need any flag stop in between your journey?

USER: I need flag stop in between my journey.

ASSISTANT: Is there any other specifications?

USER: I need to return back to my location in the afternoon.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for your valuable time. Sorry to say that, no flights were found based on your schedule.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for choosing us.