You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Erick Wilson.

ASSISTANT: Nice meeting you Wilson.

USER: I want to go Washington next week for attending a seminar there, can you please book a flight ticket for me?

ASSISTANT: Sure, I am glad to help you. Can you please provide your planned dates of travelling?

USER: Thanks, I want to take off on 01/26 and book my return ticket too on 01/28.

ASSISTANT: Ok, may I know your nearest airport codes for booking?

USER: I want to fly from ATL and destination airport is DCA.

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

USER: Ok.

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

USER: Oh! So sad it's ok no problem, I will go with another airline.

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

USER: Thank you for your service.

ASSISTANT: Welcome.