You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I want to book a ticket from ATL to SFO to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I am departing on July 05 and return on July 07.

ASSISTANT: May I know your name please?

USER: My name is Christine Walker.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight which return in evening time.

ASSISTANT: Is there any other specifications?

USER: I do not have any specifications.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.