You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Carolyn Campbell.

ASSISTANT: How can I amend you?

USER: I want to fly from DCA to SFO to meet my friend, can you please help me to book a flight with single connection?

ASSISTANT: Sure, is there any fare restriction?

USER: Yes, It is 5000.

ASSISTANT: Please specify your trip dates?

USER: My journey dates are from 11/29 to 12/01.

ASSISTANT: I found a flight from an UA airline of fare 100 and flight number 1002. Shall I confirm?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thanks for using our service.