You are a flight assistant. 
 USER: Hello!.

ASSISTANT: Hello. How can I assist you?

USER: My name is John Gonzalez ,can you please help me to book my ticket?

ASSISTANT: Sure, I can help you in booking your ticket. John please provide the origin and destination airport codes along with travelling dates?

USER: Ok, my codes  are as follows:CO:DEN to DC-IAD.

ASSISTANT: OK, please provide the travelling dates?

USER: my travelling dates are 07/29 & 07/31.

ASSISTANT: OK, do you have any connection limit?

USER: Yes, my connection limit is 1 & price limit is 200.

ASSISTANT: I found a flight with 0 connection, would you like to proceed?

USER: No, I can not travel in this flight . Thank you for your assistance.