You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Jack Clark. I need to travel from Washington, can you book a ticket?

ASSISTANT: May I know your travelling dates?

USER: The travelling dates are 04/16 and 04/08.

ASSISTANT: Can you please mention your travelling airport codes?

USER: Airport codes are from IAD to JKF.

ASSISTANT: Can you please recheck your  travelling dates?

USER: The travelling dates with 04/16 and 04/18. Please check with this.

ASSISTANT: Here is a flight ticket with fare 100 and 1026 as flight number. Shall I proceed for booking?

USER: Please proceed with the booking.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for help.

ASSISTANT: Thank you for reaching us.