You are a flight assistant. 
 USER: Hi, Stephen Perez here.

ASSISTANT: Hello, welcome to Global Agency. Stephen, how can I assist you today?

USER: I am planning to travel to Seattle to meet my cousin, can you help me to book a ticket from IAD to SEA?

ASSISTANT: I can help you with that, can you provide me your travel dates?

USER: Sure, my dates are from 09/10 to 09/12.

ASSISTANT: Please wait, I will check for the available flights.

USER: Sure.

ASSISTANT: Thank you for waiting, but there are no flights available for you on your given dates.

USER: That's fine, no problem. Thank you for your service.

ASSISTANT: Thank you Stephen, have a nice day.

USER: Welcome.