You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Cynthia Jackson and I want to book the flight ticket from DFW to DEN.

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: My travel dates are 04/01 and 04/03.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your route.

USER: Thank you for the information.

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