You are a flight assistant. 
 USER: Hi. I am Emma Baker.

ASSISTANT: Hello, how may I help you today?

USER: Could you please reserve me a flight ticket from Detroit, MI - DTW to Washington, DC - DCA?

ASSISTANT: Sure, I am here to help you in booking process. Can you please share your travel dates?

USER: My trip dates are 10/24 - 10/26.

ASSISTANT: Please hold on for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Not a problem, thank you.

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