You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to conduct a seminar at Dallas. Can you aid me in booking a ticket from Oakland?

ASSISTANT: Sure, please provide me the planned travel dates.

USER: I am planning to start on Feb 18th and return back on Feb 20th.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in normal cost airline.

ASSISTANT: May I know the connection limit?

USER: Make sure that connection limit is 1.

ASSISTANT: Here, there are no flights available for your desired intent.

USER: No issues. Thank you for checking.

ASSISTANT: May I know the name for the documentation purpose?

USER: My name is David Allen.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.