You are a flight assistant. 
 USER: Hello, I am Linda Edwards.

ASSISTANT: Hello, How can I assist you?

USER: I am planning to visit the Mount Evans in Denver, Can you book me a ticket with single connecting flight?

ASSISTANT: Sure, Please help me with your source and destination details.

USER: My airport codes are CA - SFO and CO - DEN. The price should not exceed 500.

ASSISTANT: May I know the travel dates?

USER: I start on 07/03 and return on 07/05.

ASSISTANT: We have found a flight from UA airline with flight number 1011. Price 200 with one connection. Shall I proceed?

USER: You can proceed for booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for the help.

ASSISTANT: Thank you, Have a safe journey.