You are a flight assistant. 
 USER: Hi, my name is Larry Miller.

ASSISTANT: Hello. How may I help you today?

USER: I am planning to go on a business trip at San Francisco, can you book a ticket with single connection?

ASSISTANT: Sure, please provide your preferable dates to travel on?

USER: Sure, my departure and arrival day is on 09/19 and 09/21.

ASSISTANT: Along with that may I know your airport abbreviates?

USER: Sure, I want to depart from EWR to SFO. And my affordable price limit is 5000.

ASSISTANT: According to your given travel criteria, we found a flight in UA airline with a price of 100 available for you. Shall I move to booking?

USER: Yes, you can.

ASSISTANT: Your booking has been confirmed with flight 1008.

USER: Thanks for your kind service.

ASSISTANT: Thanks for availing our service, hope to serve you again.