You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Myself William Roberts. I'm planning a trip with my friends, can you help me in booking a ticket from PHX to IAD?

ASSISTANT: May I know your travelling dates?

USER: My travel dates are from 05/13 to 05/15.

ASSISTANT: Yes, there is a flight 1027 of Delta airlines available for your request. Shall I proceed to book the ticket?

USER: Please book the ticket.

ASSISTANT: Your ticket is booked. Thank you for approaching us.

USER: Thank you for your help.