You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me to search a flight from Seattle, WA-SEA?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travelling dates are 04/22 to 04/24.

ASSISTANT: Ok, please share your destination code.

USER: The destination airport code is CA-SFO.

ASSISTANT: Sorry to say, no flights were available on your dates.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, my name is Sandra Lee.

ASSISTANT: Thank you, have a nice day.

USER: Thank you.