You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Anna Phillips here.

ASSISTANT: How can I assist you today?

USER: I would like to visit San Francisco for a business trip, can you please help me out with booking of a flight ticket?

ASSISTANT: Sure, will you provide your travelling dates please?

USER: Sure, I am planning to go on 06/23 and please book a return ticket also on 06/25.

ASSISTANT: Please provide your airport codes that you want to travel.

USER: My boarding is from ATL and destination code is SFO.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. There is no flights found under your details.

USER: Oh, not an issue. I will choose another way to go there. Anyways, thank you for the information.

ASSISTANT: Welcome, have a great day.