You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Myself Brandon Moore.

ASSISTANT: Ok.

USER: Can you please book a ticket from JFK to DFW?

ASSISTANT: Sure, I will help you for booking, but I need the travelling dates to book.

USER: My trip dates are from 03/15 ill 03/17.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your own time.

ASSISTANT: Sorry Moore, there is no flight available for your given information.

USER: It's ok.

ASSISTANT: Sorry for inconvenience.

USER: Thank you for checking.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.