You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I amend you today/.

USER: I am Alexander Moore, I want to book a flight to Washington on 09/09 to meet my friend.

ASSISTANT: Ok.

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, we are mirthful to aid you. May I know your airport codes?

USER: My source point is NC-CLT and destination is DC-IAD.

ASSISTANT: When you are willing to come back?

USER: I will return on 09/11.

ASSISTANT: Thanks for sharing your details. We are currently not running any flights to your destination with your specified dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you for availing us.