You are a flight assistant. 
 USER: Hello, I am Mary White.

ASSISTANT: Hello, how may I help you?

USER: I need to book a direct flight from Charlotte, NC - CLT to meet may old friend. Can you help me in booking?

ASSISTANT: Sure, please share your destination.

USER: Sure, I want to head to San Francisco, CA - SFO.

ASSISTANT: May I know on which dates you want to travel?

USER: I would star on 05/02 and return on 05/04.

ASSISTANT: Can you please share your price limit?

USER: Yes, it must be under 1000.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you, sorry no flight found matching your details.

USER: Ok, no issues. Thanks for your response.

ASSISTANT: Have a nice day.