You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am David Davis.

ASSISTANT: How can I help you?

USER: Will you please reserve me a flight ticket from SEA to LAX to go for an adventure with my friends?

ASSISTANT: Can I know your travel dates?

USER: My planned journey dates are Aug 09 and Aug 11.

ASSISTANT: Do you have any preference?

USER: I need a flight ticket in business class. There should be a halt in between my journey.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you for your response.