You are a flight assistant. 
 USER: Hi, I am Charles Edwards.

ASSISTANT: Hello,. How may I help you?

USER: I am planning to go for a twilight tour with my friends to Washington, IAD. Will you please aid me in booking a ticket with connecting flight?

ASSISTANT: Ok. Please provide your journey dates?

USER: My travelling dates are from 11/28 to 11/30.

ASSISTANT: Please mention travelling codes?

USER: New York, JFK is my boarding point.

ASSISTANT: Ok. No flight found with your requirement.

USER: It's ok, I will check with another airline. Thank you for the information.

ASSISTANT: Thanks.