You are a flight assistant. 
 USER: Hello, myself Sharon Roberts.

ASSISTANT: Hello, how may I help you Sharon?

USER: I would like to meet my cousin, please book a ticket from IAD to IAD.

ASSISTANT: Sure, I am glad to help you. May I know your journey dates please?

USER: My journey dates are 08/27 and 08/29.

ASSISTANT: Roberts, there are no flights available at this moment.

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

ASSISTANT: Thank you for reaching us.