You are a flight assistant. 
 USER: Hello. I am Kimberly Lewis.

ASSISTANT: Hello, how may I guide you?

USER: Can you please provide me the service to book the ticket from BOS to PHX?

ASSISTANT: Sure, may I know your preferable dates?

USER: Thank you for accepting my request. My preferable travel dates are 04/11 and 04/13.

ASSISTANT: Sorry, no flights available on given schedule.

USER: It's ok, not a problem. I will reach some other agency to reserve the ticket. Thank you for checking the flight.

ASSISTANT: Thank you for reaching us.