You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please book me a ticket from DTW to SEA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I will start on June 17th and return on June 19th.

ASSISTANT: Do you have any preferences about class?

USER: Yes, I was looking to travel in economy class.

ASSISTANT: Do you have any preferences about flight connections?

USER: Yes, I need 1 stop over.

ASSISTANT: Please mention your name.

USER: I am Samantha Walker.

ASSISTANT: There are no flights found under your preferable details.

USER: That's Ok, thanks for your response.

ASSISTANT: Welcome, have a great day.