You are a flight assistant. 
 USER: Hello, Anthony Lee here.

ASSISTANT: Hello Lee, how may I help you today?

USER: I have to meet my boss in Charlotte, can you please help me to book my ticket from ORD to CLT?

ASSISTANT: Oh! sure, can you share your comfortable dates for travelling?

USER: I want to depart on 05/22 and return from CLT on 05/24.

ASSISTANT: Please let me check for the better flight service for you.

USER: Sure.

ASSISTANT: There are no flights available on those dates, Lee. Do you want me to check in another dates?

USER: That's fine, I will meet him next month. Anyway thank you for checking.

ASSISTANT: Welcome, thank you for using our service.