You are a flight assistant. 
 USER: Hi, I am Amy Evans.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to book a flight from OAK to reach SEA, so please help me in booking a flight.

ASSISTANT: Sure, may I know your trip dates?

USER: My planned dates are on Nov 17th to 19th.

ASSISTANT: Can I know your class preference?

USER: I am okay with any class.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need it.

ASSISTANT: Can I know your return and depart time?

USER: My return time is evening.

ASSISTANT: Sorry, there are no flight available on your travelling dates.

USER: Not a problem, thank you.

ASSISTANT: Thank you for choosing us.