You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket on the route from DCA to SFO to sell my apartment, can you help me?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can you please provide your preferable dates that you want to travel?

USER: I will be taking off on 06/26 to 06/28.

ASSISTANT: Ok, on whose name I have to book this flight ticket?

USER: Ok, book i by the name of Kimberly Lopez.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no flights moving to your region with your requested dates of travelling.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Most welcome.