You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me in booking my flight ticket from DCA to DEN?

ASSISTANT: Sure, we are here to help you. Kindly share your travel dates.

USER: Thank you. My preferable journey dates are June 30 and July 02.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight for this trip.

ASSISTANT: Is there any other specification?

USER: I prefer to depart in morning flight.

ASSISTANT: Please share your name.

USER: My name is John Martinez.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thanks for reaching us.