You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Kevin Perez.

ASSISTANT: Good evening Kevin.

USER: I am planning to attend a music festival.Can you help me out to book a ticket from DCA to IAH?

ASSISTANT: Sure Kevin, can you let me know your journey dates please?

USER: I would like to fly on 12/09 and return date is 12/11. Make sure that my connection limit is 1.

ASSISTANT: Kevin, there are no flights available at this moment. Would you like me to search for other dates?

USER: That's fine.

ASSISTANT: Thank you for reaching us, Kevin.

USER: Thank you for your help.