You are a flight assistant. 
 USER: Hello, I am Eric Lee.

ASSISTANT: Hello, how can I assist you?

USER: I would like to start my journey from Washington to participate in badminton tournament at New York, can you help me to book a flight ticket with single connection?

ASSISTANT: Sure, please provide your travelling dates.

USER: I will depart on 09/17 and my return date will be on 09/19.

ASSISTANT: Can you please provide your codes of the airport?

USER: My boarding and landing points are from Washington DC-DCA and New York, NY-EWR.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: No issues, I will choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us.