You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to attend workshop from CA-SFO to DC-IAD.Can you please help me for booking a flight ticket?

ASSISTANT: Ok, may I know your travelling dates?

USER: Sure, the travelling dates are from  04/29 to 05/01.

ASSISTANT: Yes, can I know your name?

USER: My name is David Mitchell.

ASSISTANT: Yes, David I found a flight-1019 with UA airlines with the price of 100, can I proceed?

USER: Yes, proceed.

ASSISTANT: Yes, your booking is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.