You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Christopher Smith.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a flight ticket from LGA to CLT?

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

USER: I want to travel on 03/25, and need to catch return flight on 03/27.

ASSISTANT: Can I know the departure and return time please?

USER: I want to depart in the evening time.

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, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.