You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I  help you?

USER: I want to book a flight ticket from DCA to LAS, can you help me with booking please?

ASSISTANT: Your travelling dates please?

USER:   I need to travel on dates Sept 08 and Sept 10.

ASSISTANT: Do you have any specifications?

USER: I am looking for a normal cost airline.

ASSISTANT: What about connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Barbara Wright.

ASSISTANT: I am sorry no flights found on your route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.