You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from PHL to SFo. Can you help me in ticket booking?

ASSISTANT: Ok, please help me with your travel dates.

USER: My travelling dates are from 04/11 to 04/13.

ASSISTANT: UA airline is available with 1 connection and the price limit is 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Most welcome.