You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a economy class flight to visit my uncle's home. Can you book a flight for me?

ASSISTANT: Sure, please share your planned trip dates?

USER: I will fly on Aug 17 and return on Apr 19.

ASSISTANT: Can I have your name please?

USER: My name is Emma Wright.

ASSISTANT: Let me know your boarding and landing airport codes?

USER: My source point is SFO and my destination is SEA.

ASSISTANT: Any other requirements to be met?

USER: Yes, I want connecting flight and return flight in afternoon.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.