You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Emma Harris.

ASSISTANT: Nice to meet you Emma. How can I assist you now?

USER: I am planning to book a flight ticket from ATL to SFO.

ASSISTANT: Will you please provide me your travel dates?

USER: Sure. I need these dates that is from 04/19 to 04/21.

ASSISTANT: Please give me a moment, I will get the flight details. Thank you for waiting. I have found a flight as per your dates. Flight 1000 of Delta airlines with connection as 0. Shall I proceed with booking?

USER: But I need only one connection.

ASSISTANT: Sorry Emma, there is no flight with single connection. Thank you for reaching us.

USER: Ok. Thank you.