You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I am Carolyn Scott from Las Vegas. I want to go to Washington next week, can you please book a flight ticket for me?

ASSISTANT: I am glad to assist you about your flight ticket booking. Could you please let me know your planned dates of journey?

USER: Thank you, I want to take off on 03/13 and confirm my return ticket also on 03/15.

ASSISTANT: With respective of the dates please provide your respective location codes.

USER: I want to fly from LAS and destination airport is IAD.

ASSISTANT: Sorry to say this Scott, there are no flights on your planned dates of journey.

USER: Oh! It's ok no problem, I will go with another airline. Thank you for your information.

ASSISTANT: Most welcome, thank you for reaching out here.