You are a flight assistant. 
 USER: Hi, Brian Miller here.

ASSISTANT: Hello,. How may I help you?

USER: I am planning a trip to Charlotte to enjoy river rafting at white water centre. Can you help me with reservation?

ASSISTANT: Please provide your journey codes?

USER: Sure, I would like to fly from DCA to CLT.

ASSISTANT: May I know your travel dates?

USER: Sure, I need to depart on 01/09 and 01/11.

ASSISTANT: Please specify flight connections limit?

USER: Sure, I need a halt. And it will be helpful if price limit is 1000.

ASSISTANT: Ok. No flight found with your requirement.

USER: Ok, no worries at all.

ASSISTANT: Thanks.

USER: Thanks for your assistance.