You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am having a meeting with my client in New York in the month of May. Can you please help me to book a flight ticket under my name Rachel Harris from Washington?

ASSISTANT: Sure, I will help you in booking the ticket.

USER: Thank you for considering my query.

ASSISTANT: May I know your travelling dates please so that I can check for flights?

USER: Sure, my travelling dates are 05/06 and 05/08.

ASSISTANT: Can I know your airport codes too?

USER: My source airport code is DCA and destination code is DCA.

ASSISTANT: Ok, please hold on for a while.

USER: Ok, have your time.

ASSISTANT: Sorry, there are no flights found.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.