You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My name is Barbara Jones. I am planning to book a flight with single connection. Can you help me for booking a flight ticket from DCA to LGA?

ASSISTANT: Sure, I will help you. Please provide me your travel dates.

USER: My travelling dates are 04/09 an 04/11.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no flight available on your preferred dates.

USER: That's ok, thank you for checking.

ASSISTANT: Jones, thank you for contacting us.