You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Virginia Parker.

ASSISTANT: How can I help you?

USER: Can you help me in booking from DCA to LAS?

ASSISTANT: Ok, may I know your travelling dates please?

USER: My travelling dates are 10/11 to 10/13.

ASSISTANT: Sorry, no flights are currently available for you.

USER: No issue, thank you.

ASSISTANT: Thank you for using our services, have a great day ahead.