You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I want to book a ticket from IAD to PHX. Could you book a ticket?

ASSISTANT: I am happy to help you, please provide your trip dates to go.

USER: Departure date is Aug, 3 and return by Aug, 5.

ASSISTANT: Ok, may I know your preferences?

USER: I need direct flight.

ASSISTANT: Ok, may I know your name in the meanwhile?

USER: I am Ashley King.

ASSISTANT: Sorry to inform you, there is no flight found on your route.

USER: Thanks.

ASSISTANT: Thanks for choosing us.