You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, good morning. Welcome to global agency services. How can I help you now?

USER: Scott Lee this side, I am planning to change my office's base to SEA, for that I am planning to visit SEA for check with the available space for my new office, can you please help me by booking a ticket from IAD?

ASSISTANT: Sure, I will help you in booking the flight ticket. May I know the take off and landing dates of your journey?

USER: Ok, I am free to travel on the dates 11/17 and 11/19.

ASSISTANT: Thank you for your information, please wait for a while. Sorry Scott, there are no flights found on your request.

USER: Ok, I will try for reaching SEA by any other alternative way.

ASSISTANT: Do you have any other requirement that I can help you?

USER: No, not at this moment, if anything comes up I will revert back to you.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your support.

ASSISTANT: You are welcome.