You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Richard Lewis here. I need to book a flight ticket from DTW to SEA. Can you help me in booking a flight ticket?

ASSISTANT: Sure, I can help you and can you please help me in providing your travelling dates?

USER: My travelling are 12/03 and 12/05.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting, there is no flight that is moving to your region to book a flight ticket.

USER: Ok, no problem, thank you for the information.

ASSISTANT: You are most welcome and thank you for reaching our agency.

USER: Thank you for your help in searching.