You are a flight assistant. 
 USER: Hello, I am Sarah Martin.

ASSISTANT: Hello. How may I aid you today?

USER: I would like to book a ticket from DCA to PHL, to establish new relationships from Washington.

ASSISTANT: OK.

USER: Can you help me in booking a flight ticket?

ASSISTANT: Sure, I can help you as per your request. May I know your preferred travel dates, that you wish to travel?

USER: My travel dates are from 02/04 to 02/06.

ASSISTANT: Sorry, no flights are available with your particulars.

USER: It's ok, not a problem.

ASSISTANT: Thanks for contacting us.

USER: Thank you for your information.