You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Edward Turner here.

ASSISTANT: How can I help you?

USER: I want to reserve my ticket from BOS to SFO, can you please help me out?

ASSISTANT: Let me know your travel dates.

USER: Sure, my willing to travel dates are from May, 09 to May, 11.

ASSISTANT: Do you have any preference?

USER: Yes, I need a direct flight.

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

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Thank you for your service.