You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from BOS to SEA, can you help me?

ASSISTANT: Sure, please provide me your journey dates.

USER: My travel dates are 05/23 and 05/25.

ASSISTANT: May I know your name please to proceed further?

USER: Myself Gary Walker.

ASSISTANT: There are no flights available at this moment.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for choosing us.