You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a direct flight to meet my cousin, can you help me with booking?

ASSISTANT: Sure, I am here to help you for this. When are you planning your trip?

USER: My trip dates are Jan 11 and Jan 13.

ASSISTANT: Could you please share me your airport codes?

USER: My airport codes are DCA to DTW.

ASSISTANT: May I know your name please?

USER: I am Donna Rodriguez.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: At what time are you planning to depart and return?

USER: No, I don't have any specific timings.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you very much for contacting our agency.