You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Steven Martinez here. As my friend met with an accident in DCA, I want to book a ticket from HOU.

ASSISTANT: It is so sad to listen. Sure Steven, can I know the travel dates please?

USER: My travelling dates are from 02/05 to 02/07.

ASSISTANT: Ok, wait a moment please.

USER: As it is an emergency, I need a direct flight.

ASSISTANT: Sorry Steven, there are no direct flights.

USER: That's ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.

ASSISTANT: You are welcome.