You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Kimberly Phillips here. I need to reach Washington DC so please book a flight ticket from DTW to DCA.

ASSISTANT: Can you please tell me your travelling dates?

USER: Sure, I have planned my travel dates as 09/25 and 09/27.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Phillips, no flights are available on your planning dates.

USER: It's ok fine, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your time.