You are a flight assistant. 
 USER: Hello, I am Mark Walker.

ASSISTANT: Hello, how may I help you?

USER: I need a direct flight form Charlotte to Seattle. Can you help me in booking?

ASSISTANT: Sure, may I know on which dates you want to travel?

USER: I need to reach there by 06/30 to attend a board meeting and I would return on 07/02.

ASSISTANT: Can you please share your journey codes?

USER: My origin is NC - CLT and destination is WA - SEA.

ASSISTANT: Ok, please give a minute I will revert you.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry no flights were found with your requirements.

USER: Its Ok. Thanks for your information.

ASSISTANT: Have a nice day.