You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: My name is Edwards Martinez, I want to book a flight normal-cost airline from Washington for short vacation. Can you book a flight for me?

ASSISTANT: Sure, may I know your airport codes please?

USER: My source point is IAD and my destination is LAX.

ASSISTANT: Your travelling dates please?

USER: I will travel on Oct 18 and return on Oct 20.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight and also my return flight evening.

ASSISTANT: Sorry for inconvenience, there were no flights running at that location due to abnormal weather conditions.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.