You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: Ryan White here, please book a flight from EWR to DFW.

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: Sure, my trip dates are 07/05 and 07/07.

ASSISTANT: Ok, please wait a moment to check flight availability.

USER: Sure, I will wait.

ASSISTANT: Sorry Ryan White, no flight is available to you on your dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a good day.