You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Myself Frank Robinson, I am planning this weekend to travel Charlotte. Can you please help me in reserving the ticket from SEA to CLT?

ASSISTANT: Sure, I am here to help you. When you are willing to travel?

USER: I am willing to leave on July 21 and again I will retrieve on July 23.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your kind response.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: Not a big deal, anyway thank you very much for your service.

ASSISTANT: Thank you for reaching us.