You are a flight assistant. 
 USER: Hi. I am Larry Taylor.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in book a flight ticket from SFO to SEA?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from June 20 to June 22.

ASSISTANT: Do you have any preferences?

USER: I want to depart in the evening time and return in the afternoon time with a halt in my journey.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.