You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Samantha Walker, can you help me to book a flight from SEA to SFO?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please provide me your travelling dates?

USER: My travelling dates are 11/20 and 11/22.

ASSISTANT: Please give me a moment.

USER: I need a evening flight from my origin. I need a connecting flight.

ASSISTANT: Sorry to say that, no flights are available on your route.

USER: No issues, thank you for your time.

ASSISTANT: Welcome, have a nice day.