You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you?

USER: I am heading from Washington, DC - IAD to attend a conference. Can you help me with the booking?

ASSISTANT: Sure, I can help you. Please share me your travelling dates.

USER: I would like to travel on 05/15 and 05/17.

ASSISTANT: May I know your name?

USER: My name is Lisa Perez.

ASSISTANT: We found a Spirit airline, flight number:1000 and the price is  100.

USER: You can go for booking with this airline.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us.