You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: My name is Matthew Clark. Please help me to book a flight ticket from SFO to SEA.

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are from Jan, 04 to Jan, 06.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a single connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I need to return in the evening.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Nothing to worry. Thanks for your information.

ASSISTANT: Thank you for reaching us.