You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Ashley Martin from Chicago. I would like to visit Boston next week. Can you please book a flight ticket for me?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Thank you, I want to take off on 11/28 and please confirm my return ticket also on 11/30.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: I want to fly from ORD and destination airport is BOS.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, take your time and find a flight for me.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.