You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How may I help you?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you book a ticket for me?

ASSISTANT: Ok. Please provide your travel dates.

USER: 04/06 and 04/08 are my travel dates.

ASSISTANT: Please help me with ticket price limit.

USER: 1000 is my price limit.

ASSISTANT: May I know your departure airport code?

USER: San Francisco, CA - SFO is my departure airport.

ASSISTANT: Please provide your flight connections limit.

USER: It is one only.

ASSISTANT: Please let me know your name?

USER: Carol Thompson is my name.

ASSISTANT: No flight is found with your requirement.

USER: No problem.

ASSISTANT: Thanks.

USER: Thanks for your time.