You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Please help me in booking my ticket from SFO to SEA?

ASSISTANT: Can I know your journey dates?

USER: Sure, my dates of journey are from May, 07 to May, 09.

ASSISTANT: Do you have any preferences?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Please provide your name?

USER: Sure, my name is Sarah Lee.

ASSISTANT: Sorry currently there are no flights for your requirement.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Anyways, thank you for your service.