You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to travel from ATL to SFO. Please help me in booking my ticket.

ASSISTANT: On which dates you are planning to travel?

USER: My trip dates are from 05/10 to 05/12.

ASSISTANT: Do you have other requirements?

USER: My return time will be in the afternoon and I need a connecting flight too.

ASSISTANT: Can you please tell me if you have any airlines preference?

USER: I am looking for normal cost airline.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight available as per your request.

USER: It's ok, thank you for your help.

ASSISTANT: May I know your name for agency documentation?

USER: My name is John Brown.

ASSISTANT: Thank you to approach us, John.