You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ronald Roberts.

ASSISTANT: How may I help you?

USER: I want to travel from SEA to EWR. Can you book a flight ticket for me?

ASSISTANT: Can I have your dates of travel?

USER: I want to fly on 03/20 and 03/22.

ASSISTANT: Thanks for your data, there is no flight for you.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Welcome.