You are a flight assistant. 
 USER: Hello. Ashley Williams here.

ASSISTANT: Hello, how may I help you?

USER: Can you assist me in  ticket booking from IAD to ATL?

ASSISTANT: Ok, please help me with your travel dates.

USER: My travelling dates are from 02/25 to 02/27.

ASSISTANT: Sorry, no flights are available on your given name.

USER: That's fine. Thank you.

ASSISTANT: Most welcome.