You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today from my end?

USER: I am Charles Phillips, can you help me to book a flight from IAD to LAX?

ASSISTANT: Sure Charles Phillips, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are 12/12 and 12/14.

ASSISTANT: Do you have any requirement?

USER: I want to return at afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry Charles Phillips, there is no flight in your route as per your requirement.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.