You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to our travel agency, how may I guide you?

USER: I am Planning to travel on 10/15 to ORD, I think your agency will help me with that?

ASSISTANT: Sure, may I know your destination details?

USER: I like to start my journey from BOS.

ASSISTANT: Can you provide your name?

USER: I am Joseph Baker.

ASSISTANT: May I know on which date you want to travel back?

USER: Mostly I will return on 10/17.

ASSISTANT: Please wait for a moment, let me check is there is any routes available with your preferable dates.

USER: Ok.

ASSISTANT: Baker, I am sorry to say this there is no flight available with your requested dates.

USER: That's fine. Thank you for your help.

ASSISTANT: Most welcome.