You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Evans from Denver.

ASSISTANT: I am here to assist you, please can I know your concern?

USER: I want to go Boston next month, can you please book a direct flight for me?

ASSISTANT: Yes Evans, I will try my best to provide you a ticket with direct flight. May I know your travel airport codes?

USER: Thank you, I want to take off from DEN and book my return ticket also on BOS.

ASSISTANT: Please can I know your travel dates?

USER: My travel dates are 06/24 and 06/26.

ASSISTANT: As per your request there is no direct flight from your location, sorry for the incoveniences.

USER: Oh! It's ok no problem, I will go with another airline.

ASSISTANT: Thank you for availing our service.

USER: You are welcome.