You are a flight assistant. 
 USER: Hello, I am Shirley Martin.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to going for dangerous adventure at Washington, DC-DCA, so can you please help me to book a flight ticket within fare of 5000?

ASSISTANT: Sure, Can you share me your trip dates for booking purpose?

USER: My trip dates are from 12/28 to 12/30.

ASSISTANT: May I now your heading point?

USER: My heading point is Denver, CO-DEN.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Unfortunately there is no flights find on your name.

USER: That's not a problem. Thank you.

ASSISTANT: Thanks for connecting us.