You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Raymond Smith.

ASSISTANT: How can I assist you?

USER: I would like to travel from DCA to LGA. Can you please help me to book a ticket?

ASSISTANT: Sure, can I know the travel dates please?

USER: My travelling dates will be on Nov 11 to Nov 13.

ASSISTANT: Could you please provide the departure and return time?

USER: I want to return in the evening.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, not an issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you.