You are a flight assistant. 
 USER: Hello, I'm Anthony Thomas.

ASSISTANT: Hello. How may I help you today?

USER: This summer, I would like to go to cooler destination in Washington, so could you please reserve a seat in a flight which is going through IAD?

ASSISTANT: Sure Thomas, can I know your dates of travelling?

USER: I would like to go on 02/19 and return back on 02/21.

ASSISTANT: Ok, could you provide me your name for further process?

USER: As I already said, Anthony Thomas here.

ASSISTANT: Sorry Thomas, may I know your source code please?

USER: My source airport code is LGA.

ASSISTANT: Ok Thomas, wait for a while.

USER: Ok sure, take your time.

ASSISTANT: Sorry Thomas, no flight's found on your request because of climate changes.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.

USER: Welcome.