You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: My name is Gregory Rodriguez. I am looking to book a flight from SFO to ATL to meet my friend. Can you help me for booking?

ASSISTANT: Sure, I will help you in booking. Can you please share your planning dates of journey?

USER: My travelling dates are from 06/13 till 06/15.

ASSISTANT: May I know your airport codes?

USER: I have already mentioned my airport codes.

ASSISTANT: Here, I found a flight for you with 1 connection and fare is 100 in Frontier airlines. Can I proceed?

USER: Sorry, I need a direct flight.

ASSISTANT: Sorry, no airlines are providing service on your route with single connection.

USER: Ok.

ASSISTANT: Sorry, I did not find any direct flight for you.

USER: It's ok, thank you for checking.

ASSISTANT: Welcome.