You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Can you please help me in flight ticket booking process from DTW to SFO?

ASSISTANT: Sure, we are here to help you with this.

USER: Thank you for your response.

ASSISTANT: Can you please share your planned travelling dates to proceed further?

USER: I want to take off on July 25 and book my return ticket also on July 27.

ASSISTANT: Do you need a lay by in between your journey?

USER: I will prefer direct flight.

ASSISTANT: Would you like to avail any benefits for the comfort of your journey?

USER: No.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Joshua Taylor.

ASSISTANT: Thank you for sharing your journey details,  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Oh! That's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.