You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Gary Edwards. I just need your help in booking a plane ticket to CLT from DCA.

ASSISTANT: Sure, I am mirthful to help you. Please share me your travelling dates?

USER: My preferable travelling dates are from 08/04 to 08/06.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there are no flights available on your requirement.

USER: No problem. Thank you for the information.

ASSISTANT: Thanks for connecting with us, have a great day.