You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Charles Martin. I want to travel from DCA to IAD. Can you help me in booking a flight ticket?

ASSISTANT: When you want to travel?

USER: I want to fly in the flight on Jan 24 and Jan 26.

ASSISTANT: Let me know your halt in between your journey.

USER: I am looking for a direct flight.

ASSISTANT: Please share me your requirements.

USER: I don't have any other requirements.

ASSISTANT: Unfortunately there is no flight found with your matching requirements.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for reaching us.