You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Charles Evans.

ASSISTANT: How may I guide you?

USER: Can you please help me in booking my flight ticket from ORD to DTW?

ASSISTANT: Sure, can I have your journey dates please?

USER: My travelling dates are 12/23 and 12/25.

ASSISTANT: Please wait a moment, I will check the availability of flights.

USER: Ok, sure.

ASSISTANT: Thank you for your waiting, I found a flight for you in JetBlue airlines with fare 300. Can I proceed?

USER: Ok, please proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1005.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.