You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Can you please help me in booking my flight ticket from IAD to DEN?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates are May 18 and May 20.

ASSISTANT: May I know your name please?

USER: Myself William Perez.

ASSISTANT: Do you have any requirements?

USER: I need single connection flight.

ASSISTANT: There is a connecting flight in Frontier airline, can I book it?

USER: Please proceed.

ASSISTANT: Your ticket has been booked with flight number 1005.

USER: Thank you.

ASSISTANT: Thank you for approaching us.