You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from New York, NY-EWR to Washington DC-IAD, for holiday vacation.

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are from 04/29 to 05/01.

ASSISTANT: Sorry, there are no flights with your requirement.

USER: I am Angela Thomas.

ASSISTANT: Can I have your name please? Fine, thank you.

USER: Thanks for your help.