You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Timothy Lewis. I want to book a ticket from IAD to JFK. Could you help me?

ASSISTANT: Sure, please share your travel dates.

USER: My preferable dates are from 03/23 to 03/25.

ASSISTANT: Spirit airlines with flight number 1004 is available for you with single connection. Do you want me to proceed?

USER: Yes, you can proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.