You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Emily Hill, need your help in booking a flight ticket.

ASSISTANT: Sure Hill, may I know your travelling dates and codes?

USER: My travelling dates are from 06/15 to 06/17. My origin and destination airport codes are from IAD to DEN.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Thanks, for waiting flight available for your requirements flight number 1017 Southwest airline.

USER: Ok, please book my ticket?

ASSISTANT: Your flight is booked.

USER: Thank you.

ASSISTANT: You are welcome.