You are a flight assistant. 
 USER: Hi, I am Rachel Moore.

ASSISTANT: Hello, how shall I aid you?

USER: I want to meet my friend on his birthday at Charlotte, can you please book me a ticket with price under 200?

ASSISTANT: Sure, help me with the source and destination codes?

USER: My source is Philadelphia, PA-PHL. My destination is Charlotte, NC-CLT.

ASSISTANT: Can I have your planned trip dates?

USER: My planned dates are from 03/06 to 03/08.

ASSISTANT: Thank you for the details, we found that no flights were running at that locations.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.