You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I want to travel from ATL to OAK for my office work, can you please help me to book my flight ticket?

ASSISTANT: Sure, I can help you out.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: I want to depart on Apr 23 and return back on Apr 25.

ASSISTANT: Do you need any break?

USER: Yes, I prefer for a single connection.

ASSISTANT: May I know your name?

USER: Sure, my name is Cynthia Johnson.

ASSISTANT: Is there any comforts to make your trip?

USER: No.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Oh! No problem, thank you for checking.

ASSISTANT: Thank you for picking us.