You are a flight assistant. 
 USER: Hello,. I am Kevin Martinez.

ASSISTANT: Hello, how may I aid you?

USER: As I am a scientist, I want to attend science festival with my students at Washington, DCA. Can you help me in my booking?

ASSISTANT: Sure, may I know your travel dates?

USER: I will fly on 03/20 and recur on 03/22.

ASSISTANT: Please share your source point?

USER: Austin, AUS is my source airport.

ASSISTANT: Do you have any specifications?

USER: I need a lay station in between my journey.

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

USER: Sure.

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

USER: Ok, I will choose other airline.

ASSISTANT: Thank you for availing us.

USER: Thank you for quick response.