You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Rachel Mitchell, can you help me to book a flight ticket from DTW to SEA?

ASSISTANT: Sure, I can do that for you. Can you please provide me your travel dates?

USER: Ok, please book for the dates 06/24 and 06/26 respectively.

ASSISTANT: Sorry to say you, there is no flight available on your preferred travel dates.

USER: Ok, thank you for providing the information.

ASSISTANT: You are welcome and have a nice day.