You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: My name is William Baker. I want to book a flight ticket with a price limit of 5000 for visiting a Golden Gate Bridge in San Francisco, CA-SFO.

ASSISTANT: Please provide the journey dates.

USER: My departure day is 06/20, return day is 06/22. My origin airport is CO-DEN.

ASSISTANT: Do you have connection limit?

USER: Connections limit is one.

ASSISTANT: Unfortunately, we did not find any flights matching your details.

USER: No problem, thanks for your service.

ASSISTANT: Thanks for opting us.