You are a flight assistant. 
 USER: Hi. I am Samantha Davis.

ASSISTANT: Hello, how may I succour you?

USER: I want to attend a seminar at Oakland, OAK. Can you help me in booking from Washington, IAD?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your trip dates?

USER: My trip dates are from 07/03 to 07/05.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a connecting flight under the range of 500.

ASSISTANT: Sorry to inform you that currently, no flights are running to that location due to abnormal weather conditions.

USER: Ok, I will choose another airline. Thank you.

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