You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: I want to book a direct flight ticket to attend an emergency case at DC. Can you help me?

ASSISTANT: Sure, I am here to help you in booking. Please share your planned travelling dates.

USER: Feb 04th and 06th are my travelling dates.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I need  a direct flight.

ASSISTANT: Kindly share your boarding and landing airport codes.

USER: HOU and IAD are my airport codes.

ASSISTANT: May I know your name please?

USER: Paul Lopez here.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: I would like to travel in an normal-cost airlines.

ASSISTANT: Thank you for sharing your journey details, sorry to inform you currently no flights are running at that locations due to abnormal weather conditions.

USER: No issue, Thank you.

ASSISTANT: Thank you for approaching us.