You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Larry Evans.

ASSISTANT: How can I help you?

USER: I am looking to book a flight ticket from DCA to DEN, can you please help me out?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My travelling dates are 04/15 and 04/17.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Here, I found a flight for you with single connection.

USER: Please proceed for further.

ASSISTANT: Your ticket is booked with flight number 1003 and airline is Hawaiian.

USER: Thank you for your service.

ASSISTANT: Welcome, have a safe flight. Thank you for choosing us.