You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Joshua Phillips from Denver. I have to go to Boston next month. Can you please help me in flight ticket booking process?

ASSISTANT: Sure, I am here to help you. Can you please provide me your travel dates?

USER: Thank you for your positive response, I want to take off on 09/20 and please confirm my return ticket also on 09/22.

ASSISTANT: Ok, please provide me your source and destination airport codes.

USER: I would like to fly from DEN and destination airport is BOS.

ASSISTANT: Ok, please be on hold for a while.

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

ASSISTANT: Phillips, there is no flight available on 09/20 to BOS.

USER: Oh! It's ok no problem, I will contact another airline agency. Thank you for your service.

ASSISTANT: You are most welcome and thank you for contacting us.