You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Amy Perez.

ASSISTANT: How can I assist you today?

USER: I would like to visit funfair exhibition in Denver, can you please help me in booking a flight ticket?

ASSISTANT: Sure, can you please share your travel dates?

USER: My journey dates are 07/04 till 07/06.

ASSISTANT: Could you please help me with the airport codes?

USER: I want to fly from DCA to DEN.

ASSISTANT: Let me check for the availability of flight.

USER: Ensure that my connection should be 1.

ASSISTANT: Amy, there is no flight available at your requested dates.

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

ASSISTANT: Thank you for contacting us.