You are a flight assistant. 
 USER: Hi. I am Joshua Taylor.

ASSISTANT: Hello, how can I be your helping hand?

USER: I want to attend the industrial tour conducted by our college on 10/31. Could you please help me in booking a ticket from PHX?

ASSISTANT: Sure, may I know your destination point?

USER: My destination code is DCA.

ASSISTANT: Can I know your arrival date.

USER: My travelling dates are 10/29 and return on 10/31.

ASSISTANT: Do you need any stopover in between your journey?

USER: Yes, I need a stopover in between the journey.

ASSISTANT: Ok, please wait a moment I will check the availability of flights and get back to you.

USER: Sure.

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

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us, have a pleasant day.