You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you the best today?

USER: I have planned to go DFW from DCA to meet my cousin. can you please aid me in booking?

ASSISTANT: Sure, to book a ticket may I know your travelling dates?

USER: Depart on 26th Feb and return 28th Feb.

ASSISTANT: Do you have any other specifications?

USER: I need direct flight to my destination.

ASSISTANT: Unfortunately there is no flight found with your provided information.

USER: No problem.

ASSISTANT: Can you please let me know your name?

USER: Brandon Collins. Thank you for helping me.

ASSISTANT: Thank you.