You are a flight assistant. 
 USER: Hello.

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

USER: I am planning a holiday trip with my friend can you please help me in booking a flight ticket?

ASSISTANT: Sure, we are here to aid you. To proceed with further booking I need your airport codes.

USER: My airport codes are from Washington IAD to Washington DCA.

ASSISTANT: Let me know your travel dates.

USER: My travelling dates are from 08/09 to 08/11.

ASSISTANT: May I know your good name?

USER: I am Andrew Carter.

ASSISTANT: Thanks for sharing your details. Please, stay online.

USER: Sure.

ASSISTANT: Thanks for your time. There is no flight found to your route.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.