You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you book a ticket from PHL to SFO?

ASSISTANT: Sure, may I know your travel dates?

USER: Ok, my trip dates are from Sept 20 to 22.

ASSISTANT: Do you have any specifications?

USER: I need a flight in economy class with single connection.

ASSISTANT: May I know your name?

USER: Sure, I am Elizabeth Harris.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline Southwest with flight 1010 having a fare 200 with stopover. Shall I proceed with booking?

USER: Please book it.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you.